nsz Git - libfirm/blob - ir/lower/lower_dw.c

   1 /*
   2  * Copyright (C) 1995-2011 University of Karlsruhe.  All right reserved.
   3  *
   4  * This file is part of libFirm.
   5  *
   6  * This file may be distributed and/or modified under the terms of the
   7  * GNU General Public License version 2 as published by the Free Software
   8  * Foundation and appearing in the file LICENSE.GPL included in the
   9  * packaging of this file.
  10  *
  11  * Licensees holding valid libFirm Professional Edition licenses may use
  12  * this file in accordance with the libFirm Commercial License.
  13  * Agreement provided with the Software.
  14  *
  15  * This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
  16  * WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  17  * PURPOSE.
  18  */
  19
  20 /**
  21  * @file
  22  * @brief   Lower double word operations, i.e. 64bit -> 32bit, 32bit -> 16bit etc.
  23  * @date    8.10.2004
  24  * @author  Michael Beck
  25  * @version $Id$
  26  */
  27 #include "config.h"
  28
  29 #include <string.h>
  30 #include <stdlib.h>
  31 #include <stdbool.h>
  32 #include <assert.h>
  33
  34 #include "be.h"
  35 #include "error.h"
  36 #include "lowering.h"
  37 #include "irnode_t.h"
  38 #include "irnodeset.h"
  39 #include "irgraph_t.h"
  40 #include "irmode_t.h"
  41 #include "iropt_t.h"
  42 #include "irgmod.h"
  43 #include "tv_t.h"
  44 #include "dbginfo_t.h"
  45 #include "iropt_dbg.h"
  46 #include "irflag_t.h"
  47 #include "firmstat.h"
  48 #include "irgwalk.h"
  49 #include "ircons.h"
  50 #include "irflag.h"
  51 #include "iroptimize.h"
  52 #include "irtools.h"
  53 #include "debug.h"
  54 #include "set.h"
  55 #include "pmap.h"
  56 #include "pdeq.h"
  57 #include "irdump.h"
  58 #include "array_t.h"
  59 #include "irpass_t.h"
  60 #include "lower_dw.h"
  61
  62 /** A map from (op, imode, omode) to Intrinsic functions entities. */
  63 static set *intrinsic_fkt;
  64
  65 /** A map from (imode, omode) to conv function types. */
  66 static set *conv_types;
  67
  68 /** A map from a method type to its lowered type. */
  69 static pmap *lowered_type;
  70
  71 /** A map from a builtin type to its lower and higher type. */
  72 static pmap *lowered_builtin_type_high;
  73 static pmap *lowered_builtin_type_low;
  74
  75 /** The types for the binop and unop intrinsics. */
  76 static ir_type *binop_tp_u, *binop_tp_s, *unop_tp_u, *unop_tp_s, *tp_s, *tp_u;
  77
  78 static ir_nodeset_t created_mux_nodes;
  79
  80 /** the debug handle */
  81 DEBUG_ONLY(static firm_dbg_module_t *dbg = NULL;)
  82
  83 /**
  84  * An entry in the (op, imode, omode) -> entity map.
  85  */
  86 typedef struct op_mode_entry {
  87         const ir_op   *op;    /**< the op */
  88         const ir_mode *imode; /**< the input mode */
  89         const ir_mode *omode; /**< the output mode */
  90         ir_entity     *ent;   /**< the associated entity of this (op, imode, omode) triple */
  91 } op_mode_entry_t;
  92
  93 /**
  94  * An entry in the (imode, omode) -> tp map.
  95  */
  96 typedef struct conv_tp_entry {
  97         const ir_mode *imode; /**< the input mode */
  98         const ir_mode *omode; /**< the output mode */
  99         ir_type       *mtd;   /**< the associated method type of this (imode, omode) pair */
 100 } conv_tp_entry_t;
 101
 102 enum lower_flags {
 103         MUST_BE_LOWERED = 1,  /**< graph must be lowered */
 104         CF_CHANGED      = 2,  /**< control flow was changed */
 105 };
 106
 107 /**
 108  * The lower environment.
 109  */
 110 typedef struct lower_dw_env_t {
 111         lower64_entry_t **entries;     /**< entries per node */
 112         ir_graph      *irg;
 113         struct obstack obst;           /**< an obstack holding the temporary data */
 114         ir_tarval *tv_mode_bytes;      /**< a tarval containing the number of bytes in the lowered modes */
 115         ir_tarval *tv_mode_bits;       /**< a tarval containing the number of bits in the lowered modes */
 116         pdeq      *waitq;              /**< a wait queue of all nodes that must be handled later */
 117         ir_node  **lowered_phis;       /**< list of lowered phis */
 118         ir_mode   *high_signed;        /**< doubleword signed type */
 119         ir_mode   *high_unsigned;      /**< doubleword unsigned type */
 120         ir_mode   *low_signed;         /**< word signed type */
 121         ir_mode   *low_unsigned;       /**< word unsigned type */
 122         ident     *first_id;           /**< .l for little and .h for big endian */
 123         ident     *next_id;            /**< .h for little and .l for big endian */
 124         const lwrdw_param_t *params;   /**< transformation parameter */
 125         unsigned flags;                /**< some flags */
 126         unsigned n_entries;            /**< number of entries */
 127 } lower_dw_env_t;
 128
 129 static lower_dw_env_t *env;
 130
 131 static void lower_node(ir_node *node);
 132
 133 /**
 134  * Create a method type for a Conv emulation from imode to omode.
 135  */
 136 static ir_type *get_conv_type(ir_mode *imode, ir_mode *omode)
 137 {
 138         conv_tp_entry_t key, *entry;
 139         ir_type *mtd;
 140
 141         key.imode = imode;
 142         key.omode = omode;
 143         key.mtd   = NULL;
 144
 145         entry = (conv_tp_entry_t*)set_insert(conv_types, &key, sizeof(key), HASH_PTR(imode) ^ HASH_PTR(omode));
 146         if (! entry->mtd) {
 147                 int n_param = 1, n_res = 1;
 148
 149                 if (imode == env->high_signed || imode == env->high_unsigned)
 150                         n_param = 2;
 151                 if (omode == env->high_signed || omode == env->high_unsigned)
 152                         n_res = 2;
 153
 154                 /* create a new one */
 155                 mtd = new_type_method(n_param, n_res);
 156
 157                 /* set param types and result types */
 158                 n_param = 0;
 159                 if (imode == env->high_signed) {
 160                         set_method_param_type(mtd, n_param++, tp_u);
 161                         set_method_param_type(mtd, n_param++, tp_s);
 162                 } else if (imode == env->high_unsigned) {
 163                         set_method_param_type(mtd, n_param++, tp_u);
 164                         set_method_param_type(mtd, n_param++, tp_u);
 165                 } else {
 166                         ir_type *tp = get_type_for_mode(imode);
 167                         set_method_param_type(mtd, n_param++, tp);
 168                 }
 169
 170                 n_res = 0;
 171                 if (omode == env->high_signed) {
 172                         set_method_res_type(mtd, n_res++, tp_u);
 173                         set_method_res_type(mtd, n_res++, tp_s);
 174                 } else if (omode == env->high_unsigned) {
 175                         set_method_res_type(mtd, n_res++, tp_u);
 176                         set_method_res_type(mtd, n_res++, tp_u);
 177                 } else {
 178                         ir_type *tp = get_type_for_mode(omode);
 179                         set_method_res_type(mtd, n_res++, tp);
 180                 }
 181                 entry->mtd = mtd;
 182         } else {
 183                 mtd = entry->mtd;
 184         }
 185         return mtd;
 186 }
 187
 188 /**
 189  * Add an additional control flow input to a block.
 190  * Patch all Phi nodes. The new Phi inputs are copied from
 191  * old input number nr.
 192  */
 193 static void add_block_cf_input_nr(ir_node *block, int nr, ir_node *cf)
 194 {
 195         int i, arity = get_irn_arity(block);
 196         ir_node **in;
 197         const ir_edge_t *edge;
 198
 199         assert(nr < arity);
 200
 201         NEW_ARR_A(ir_node *, in, arity + 1);
 202         for (i = 0; i < arity; ++i)
 203                 in[i] = get_irn_n(block, i);
 204         in[i] = cf;
 205
 206         set_irn_in(block, i + 1, in);
 207
 208         foreach_out_edge(block, edge) {
 209                 ir_node *phi = get_edge_src_irn(edge);
 210                 if (!is_Phi(phi))
 211                         continue;
 212
 213                 for (i = 0; i < arity; ++i)
 214                         in[i] = get_irn_n(phi, i);
 215                 in[i] = in[nr];
 216                 set_irn_in(phi, i + 1, in);
 217         }
 218 }
 219
 220 /**
 221  * Add an additional control flow input to a block.
 222  * Patch all Phi nodes. The new Phi inputs are copied from
 223  * old input from cf tmpl.
 224  */
 225 static void add_block_cf_input(ir_node *block, ir_node *tmpl, ir_node *cf)
 226 {
 227         int i, arity = get_irn_arity(block);
 228         int nr = 0;
 229
 230         for (i = 0; i < arity; ++i) {
 231                 if (get_irn_n(block, i) == tmpl) {
 232                         nr = i;
 233                         break;
 234                 }
 235         }
 236         assert(i < arity);
 237         add_block_cf_input_nr(block, nr, cf);
 238 }
 239
 240 /**
 241  * Return the "operational" mode of a Firm node.
 242  */
 243 static ir_mode *get_irn_op_mode(ir_node *node)
 244 {
 245         switch (get_irn_opcode(node)) {
 246         case iro_Load:
 247                 return get_Load_mode(node);
 248         case iro_Store:
 249                 return get_irn_mode(get_Store_value(node));
 250         case iro_Div:
 251                 return get_irn_mode(get_Div_left(node));
 252         case iro_Mod:
 253                 return get_irn_mode(get_Mod_left(node));
 254         case iro_Cmp:
 255                 return get_irn_mode(get_Cmp_left(node));
 256         default:
 257                 return get_irn_mode(node);
 258         }
 259 }
 260
 261 /**
 262  * Walker, prepare the node links and determine which nodes need to be lowered
 263  * at all.
 264  */
 265 static void prepare_links(ir_node *node)
 266 {
 267         ir_mode         *mode = get_irn_op_mode(node);
 268         lower64_entry_t *link;
 269
 270         if (mode == env->high_signed || mode == env->high_unsigned) {
 271                 unsigned idx = get_irn_idx(node);
 272                 /* ok, found a node that will be lowered */
 273                 link = OALLOCZ(&env->obst, lower64_entry_t);
 274
 275                 if (idx >= env->n_entries) {
 276                         /* enlarge: this happens only for Rotl nodes which is RARELY */
 277                         unsigned old   = env->n_entries;
 278                         unsigned n_idx = idx + (idx >> 3);
 279
 280                         ARR_RESIZE(lower64_entry_t *, env->entries, n_idx);
 281                         memset(&env->entries[old], 0, (n_idx - old) * sizeof(env->entries[0]));
 282                         env->n_entries = n_idx;
 283                 }
 284                 env->entries[idx] = link;
 285                 env->flags |= MUST_BE_LOWERED;
 286         } else if (is_Conv(node)) {
 287                 /* Conv nodes have two modes */
 288                 ir_node *pred = get_Conv_op(node);
 289                 mode = get_irn_mode(pred);
 290
 291                 if (mode == env->high_signed || mode == env->high_unsigned) {
 292                         /* must lower this node either but don't need a link */
 293                         env->flags |= MUST_BE_LOWERED;
 294                 }
 295                 return;
 296         } else if (is_Call(node)) {
 297                 /* Special case:  If the result of the Call is never used, we won't
 298                  * find a Proj with a mode that potentially triggers MUST_BE_LOWERED
 299                  * to be set.  Thus, if we see a call, we check its result types and
 300                  * decide whether MUST_BE_LOWERED has to be set.
 301                  */
 302                 ir_type *tp = get_Call_type(node);
 303                 size_t   n_res, i;
 304
 305                 n_res = get_method_n_ress(tp);
 306                 for (i = 0; i < n_res; ++i) {
 307                         ir_type *rtp = get_method_res_type(tp, i);
 308
 309                         if (is_Primitive_type(rtp)) {
 310                                 ir_mode *rmode = get_type_mode(rtp);
 311
 312                                 if (rmode == env->high_signed || rmode == env->high_unsigned) {
 313                                         env->flags |= MUST_BE_LOWERED;
 314                                 }
 315                         }
 316                 }
 317         }
 318 }
 319
 320 lower64_entry_t *get_node_entry(ir_node *node)
 321 {
 322         unsigned idx = get_irn_idx(node);
 323         assert(idx < env->n_entries);
 324         return env->entries[idx];
 325 }
 326
 327 void ir_set_dw_lowered(ir_node *old, ir_node *new_low, ir_node *new_high)
 328 {
 329         lower64_entry_t *entry = get_node_entry(old);
 330         entry->low_word  = new_low;
 331         entry->high_word = new_high;
 332 }
 333
 334 ir_mode *ir_get_low_unsigned_mode(void)
 335 {
 336         return env->low_unsigned;
 337 }
 338
 339 /**
 340  * Translate a Constant: create two.
 341  */
 342 static void lower_Const(ir_node *node, ir_mode *mode)
 343 {
 344         ir_graph  *irg      = get_irn_irg(node);
 345         dbg_info  *dbg      = get_irn_dbg_info(node);
 346         ir_mode   *low_mode = env->low_unsigned;
 347         ir_tarval *tv       = get_Const_tarval(node);
 348         ir_tarval *tv_l     = tarval_convert_to(tv, low_mode);
 349         ir_node   *res_low  = new_rd_Const(dbg, irg, tv_l);
 350         ir_tarval *tv_shrs  = tarval_shrs(tv, env->tv_mode_bits);
 351         ir_tarval *tv_h     = tarval_convert_to(tv_shrs, mode);
 352         ir_node   *res_high = new_rd_Const(dbg, irg, tv_h);
 353
 354         ir_set_dw_lowered(node, res_low, res_high);
 355 }
 356
 357 /**
 358  * Translate a Load: create two.
 359  */
 360 static void lower_Load(ir_node *node, ir_mode *mode)
 361 {
 362         ir_mode    *low_mode = env->low_unsigned;
 363         ir_graph   *irg = get_irn_irg(node);
 364         ir_node    *adr = get_Load_ptr(node);
 365         ir_node    *mem = get_Load_mem(node);
 366         ir_node    *low;
 367         ir_node    *high;
 368         ir_node    *proj_m;
 369         dbg_info   *dbg;
 370         ir_node    *block = get_nodes_block(node);
 371         ir_cons_flags volatility = get_Load_volatility(node) == volatility_is_volatile
 372                                  ? cons_volatile : cons_none;
 373         const ir_edge_t *edge;
 374         const ir_edge_t *next;
 375
 376         if (env->params->little_endian) {
 377                 low  = adr;
 378                 high = new_r_Add(block, adr, new_r_Const(irg, env->tv_mode_bytes), get_irn_mode(adr));
 379         } else {
 380                 low  = new_r_Add(block, adr, new_r_Const(irg, env->tv_mode_bytes), get_irn_mode(adr));
 381                 high = adr;
 382         }
 383
 384         /* create two loads */
 385         dbg    = get_irn_dbg_info(node);
 386         low    = new_rd_Load(dbg, block, mem,  low,  low_mode, volatility);
 387         proj_m = new_r_Proj(low, mode_M, pn_Load_M);
 388         high   = new_rd_Load(dbg, block, proj_m, high, mode, volatility);
 389
 390         foreach_out_edge_safe(node, edge, next) {
 391                 ir_node *proj = get_edge_src_irn(edge);
 392                 if (!is_Proj(proj))
 393                         continue;
 394
 395                 switch (get_Proj_proj(proj)) {
 396                 case pn_Load_M:         /* Memory result. */
 397                         /* put it to the second one */
 398                         set_Proj_pred(proj, high);
 399                         break;
 400                 case pn_Load_X_except:  /* Execution result if exception occurred. */
 401                         /* put it to the first one */
 402                         set_Proj_pred(proj, low);
 403                         break;
 404                 case pn_Load_res: {       /* Result of load operation. */
 405                         ir_node *res_low  = new_r_Proj(low,  low_mode, pn_Load_res);
 406                         ir_node *res_high = new_r_Proj(high, mode,     pn_Load_res);
 407                         ir_set_dw_lowered(proj, res_low, res_high);
 408                         break;
 409                 }
 410                 default:
 411                         assert(0 && "unexpected Proj number");
 412                 }
 413                 /* mark this proj: we have handled it already, otherwise we might fall
 414                  * into out new nodes. */
 415                 mark_irn_visited(proj);
 416         }
 417 }
 418
 419 /**
 420  * Translate a Store: create two.
 421  */
 422 static void lower_Store(ir_node *node, ir_mode *mode)
 423 {
 424         ir_graph              *irg;
 425         ir_node               *block, *adr, *mem;
 426         ir_node               *low, *high, *proj_m;
 427         dbg_info              *dbg;
 428         ir_node               *value = get_Store_value(node);
 429         const lower64_entry_t *entry = get_node_entry(value);
 430         ir_cons_flags volatility = get_Store_volatility(node) == volatility_is_volatile
 431                                    ? cons_volatile : cons_none;
 432         const ir_edge_t *edge;
 433         const ir_edge_t *next;
 434         (void) mode;
 435
 436         assert(entry);
 437
 438         if (! entry->low_word) {
 439                 /* not ready yet, wait */
 440                 pdeq_putr(env->waitq, node);
 441                 return;
 442         }
 443
 444         irg = get_irn_irg(node);
 445         adr = get_Store_ptr(node);
 446         mem = get_Store_mem(node);
 447         block = get_nodes_block(node);
 448
 449         if (env->params->little_endian) {
 450                 low  = adr;
 451                 high = new_r_Add(block, adr, new_r_Const(irg, env->tv_mode_bytes), get_irn_mode(adr));
 452         } else {
 453                 low  = new_r_Add(block, adr, new_r_Const(irg, env->tv_mode_bytes), get_irn_mode(adr));
 454                 high = adr;
 455         }
 456
 457         /* create two Stores */
 458         dbg    = get_irn_dbg_info(node);
 459         low    = new_rd_Store(dbg, block, mem, low,  entry->low_word, volatility);
 460         proj_m = new_r_Proj(low, mode_M, pn_Store_M);
 461         high   = new_rd_Store(dbg, block, proj_m, high, entry->high_word, volatility);
 462
 463         foreach_out_edge_safe(node, edge, next) {
 464                 ir_node *proj = get_edge_src_irn(edge);
 465                 if (!is_Proj(proj))
 466                         continue;
 467
 468                 switch (get_Proj_proj(proj)) {
 469                 case pn_Store_M:         /* Memory result. */
 470                         /* put it to the second one */
 471                         set_Proj_pred(proj, high);
 472                         break;
 473                 case pn_Store_X_except:  /* Execution result if exception occurred. */
 474                         /* put it to the first one */
 475                         set_Proj_pred(proj, low);
 476                         break;
 477                 default:
 478                         assert(0 && "unexpected Proj number");
 479                 }
 480                 /* mark this proj: we have handled it already, otherwise we might fall into
 481                  * out new nodes. */
 482                 mark_irn_visited(proj);
 483         }
 484 }
 485
 486 /**
 487  * Return a node containing the address of the intrinsic emulation function.
 488  *
 489  * @param method  the method type of the emulation function
 490  * @param op      the emulated ir_op
 491  * @param imode   the input mode of the emulated opcode
 492  * @param omode   the output mode of the emulated opcode
 493  * @param env     the lower environment
 494  */
 495 static ir_node *get_intrinsic_address(ir_type *method, ir_op *op,
 496                                       ir_mode *imode, ir_mode *omode)
 497 {
 498         symconst_symbol sym;
 499         ir_entity *ent;
 500         op_mode_entry_t key, *entry;
 501
 502         key.op    = op;
 503         key.imode = imode;
 504         key.omode = omode;
 505         key.ent   = NULL;
 506
 507         entry = (op_mode_entry_t*)set_insert(intrinsic_fkt, &key, sizeof(key),
 508                                 HASH_PTR(op) ^ HASH_PTR(imode) ^ (HASH_PTR(omode) << 8));
 509         if (! entry->ent) {
 510                 /* create a new one */
 511                 ent = env->params->create_intrinsic(method, op, imode, omode, env->params->ctx);
 512
 513                 assert(ent && "Intrinsic creator must return an entity");
 514                 entry->ent = ent;
 515         } else {
 516                 ent = entry->ent;
 517         }
 518         sym.entity_p = ent;
 519         return new_r_SymConst(env->irg, mode_P_code, sym, symconst_addr_ent);
 520 }
 521
 522 /**
 523  * Translate a Div.
 524  *
 525  * Create an intrinsic Call.
 526  */
 527 static void lower_Div(ir_node *node, ir_mode *mode)
 528 {
 529         ir_node         *left   = get_Div_left(node);
 530         ir_node         *right  = get_Div_right(node);
 531         ir_node         *block  = get_nodes_block(node);
 532         dbg_info        *dbgi   = get_irn_dbg_info(node);
 533         ir_type         *mtp    = mode_is_signed(mode) ? binop_tp_s : binop_tp_u;
 534         ir_mode         *opmode = get_irn_op_mode(node);
 535         ir_node         *addr
 536             = get_intrinsic_address(mtp, get_irn_op(node), opmode, opmode);
 537         ir_node         *in[4];
 538         ir_node         *call;
 539         ir_node         *resproj;
 540         const ir_edge_t *edge;
 541         const ir_edge_t *next;
 542
 543         if (env->params->little_endian) {
 544                 in[0] = get_lowered_low(left);
 545                 in[1] = get_lowered_high(left);
 546                 in[2] = get_lowered_low(right);
 547                 in[3] = get_lowered_high(right);
 548         } else {
 549                 in[0] = get_lowered_high(left);
 550                 in[1] = get_lowered_low(left);
 551                 in[2] = get_lowered_high(right);
 552                 in[3] = get_lowered_low(right);
 553         }
 554         call    = new_rd_Call(dbgi, block, get_Div_mem(node), addr, 4, in, mtp);
 555         resproj = new_r_Proj(call, mode_T, pn_Call_T_result);
 556         set_irn_pinned(call, get_irn_pinned(node));
 557
 558         foreach_out_edge_safe(node, edge, next) {
 559                 ir_node *proj = get_edge_src_irn(edge);
 560                 if (!is_Proj(proj))
 561                         continue;
 562
 563                 switch (get_Proj_proj(proj)) {
 564                 case pn_Div_M:         /* Memory result. */
 565                         /* reroute to the call */
 566                         set_Proj_pred(proj, call);
 567                         set_Proj_proj(proj, pn_Call_M);
 568                         break;
 569                 case pn_Div_X_regular:
 570                         set_Proj_pred(proj, call);
 571                         set_Proj_proj(proj, pn_Call_X_regular);
 572                         break;
 573                 case pn_Div_X_except:
 574                         set_Proj_pred(proj, call);
 575                         set_Proj_proj(proj, pn_Call_X_except);
 576                         break;
 577                 case pn_Div_res:
 578                         if (env->params->little_endian) {
 579                                 ir_node *res_low  = new_r_Proj(resproj, env->low_unsigned, 0);
 580                                 ir_node *res_high = new_r_Proj(resproj, mode,              1);
 581                                 ir_set_dw_lowered(proj, res_low, res_high);
 582                         } else {
 583                                 ir_node *res_low  = new_r_Proj(resproj, env->low_unsigned, 1);
 584                                 ir_node *res_high = new_r_Proj(resproj, mode,              0);
 585                                 ir_set_dw_lowered(proj, res_low, res_high);
 586                         }
 587                         break;
 588                 default:
 589                         assert(0 && "unexpected Proj number");
 590                 }
 591                 /* mark this proj: we have handled it already, otherwise we might fall into
 592                  * out new nodes. */
 593                 mark_irn_visited(proj);
 594         }
 595 }
 596
 597 /**
 598  * Translate a Mod.
 599  *
 600  * Create an intrinsic Call.
 601  */
 602 static void lower_Mod(ir_node *node, ir_mode *mode)
 603 {
 604         ir_node         *left   = get_Mod_left(node);
 605         ir_node         *right  = get_Mod_right(node);
 606         dbg_info        *dbgi   = get_irn_dbg_info(node);
 607         ir_node         *block  = get_nodes_block(node);
 608         ir_type         *mtp    = mode_is_signed(mode) ? binop_tp_s : binop_tp_u;
 609         ir_mode         *opmode = get_irn_op_mode(node);
 610         ir_node         *addr
 611             = get_intrinsic_address(mtp, get_irn_op(node), opmode, opmode);
 612         ir_node         *in[4];
 613         ir_node         *call;
 614         ir_node         *resproj;
 615         const ir_edge_t *edge;
 616         const ir_edge_t *next;
 617
 618         if (env->params->little_endian) {
 619                 in[0] = get_lowered_low(left);
 620                 in[1] = get_lowered_high(left);
 621                 in[2] = get_lowered_low(right);
 622                 in[3] = get_lowered_high(right);
 623         } else {
 624                 in[0] = get_lowered_high(left);
 625                 in[1] = get_lowered_low(left);
 626                 in[2] = get_lowered_high(right);
 627                 in[3] = get_lowered_low(right);
 628         }
 629         call    = new_rd_Call(dbgi, block, get_Mod_mem(node), addr, 4, in, mtp);
 630         resproj = new_r_Proj(call, mode_T, pn_Call_T_result);
 631         set_irn_pinned(call, get_irn_pinned(node));
 632
 633         foreach_out_edge_safe(node, edge, next) {
 634                 ir_node *proj = get_edge_src_irn(edge);
 635                 if (!is_Proj(proj))
 636                         continue;
 637
 638                 switch (get_Proj_proj(proj)) {
 639                 case pn_Mod_M:         /* Memory result. */
 640                         /* reroute to the call */
 641                         set_Proj_pred(proj, call);
 642                         set_Proj_proj(proj, pn_Call_M);
 643                         break;
 644                 case pn_Div_X_regular:
 645                         set_Proj_pred(proj, call);
 646                         set_Proj_proj(proj, pn_Call_X_regular);
 647                         break;
 648                 case pn_Mod_X_except:
 649                         set_Proj_pred(proj, call);
 650                         set_Proj_proj(proj, pn_Call_X_except);
 651                         break;
 652                 case pn_Mod_res:
 653                         if (env->params->little_endian) {
 654                                 ir_node *res_low  = new_r_Proj(resproj, env->low_unsigned, 0);
 655                                 ir_node *res_high = new_r_Proj(resproj, mode,              1);
 656                                 ir_set_dw_lowered(proj, res_low, res_high);
 657                         } else {
 658                                 ir_node *res_low  = new_r_Proj(resproj, env->low_unsigned, 1);
 659                                 ir_node *res_high = new_r_Proj(resproj, mode,              0);
 660                                 ir_set_dw_lowered(proj, res_low, res_high);
 661                         }
 662                         break;
 663                 default:
 664                         assert(0 && "unexpected Proj number");
 665                 }
 666                 /* mark this proj: we have handled it already, otherwise we might fall
 667                  * into out new nodes. */
 668                 mark_irn_visited(proj);
 669         }
 670 }
 671
 672 /**
 673  * Translate a binop.
 674  *
 675  * Create an intrinsic Call.
 676  */
 677 static void lower_binop(ir_node *node, ir_mode *mode)
 678 {
 679         ir_node  *left  = get_binop_left(node);
 680         ir_node  *right = get_binop_right(node);
 681         dbg_info *dbgi  = get_irn_dbg_info(node);
 682         ir_node  *block = get_nodes_block(node);
 683         ir_graph *irg   = get_irn_irg(block);
 684         ir_type  *mtp   = mode_is_signed(mode) ? binop_tp_s : binop_tp_u;
 685         ir_node  *addr  = get_intrinsic_address(mtp, get_irn_op(node), mode, mode);
 686         ir_node  *in[4];
 687         ir_node  *call;
 688         ir_node  *resproj;
 689
 690         if (env->params->little_endian) {
 691                 in[0] = get_lowered_low(left);
 692                 in[1] = get_lowered_high(left);
 693                 in[2] = get_lowered_low(right);
 694                 in[3] = get_lowered_high(right);
 695         } else {
 696                 in[0] = get_lowered_high(left);
 697                 in[1] = get_lowered_low(left);
 698                 in[2] = get_lowered_high(right);
 699                 in[3] = get_lowered_low(right);
 700         }
 701         call    = new_rd_Call(dbgi, block, get_irg_no_mem(irg), addr, 4, in, mtp);
 702         resproj = new_r_Proj(call, mode_T, pn_Call_T_result);
 703         set_irn_pinned(call, get_irn_pinned(node));
 704
 705         if (env->params->little_endian) {
 706                 ir_node *res_low  = new_r_Proj(resproj, env->low_unsigned, 0);
 707                 ir_node *res_high = new_r_Proj(resproj, mode,              1);
 708                 ir_set_dw_lowered(node, res_low, res_high);
 709         } else {
 710                 ir_node *res_low  = new_r_Proj(resproj, env->low_unsigned, 1);
 711                 ir_node *res_high = new_r_Proj(resproj, mode,              0);
 712                 ir_set_dw_lowered(node, res_low, res_high);
 713         }
 714 }
 715
 716 static ir_node *create_conv(ir_node *block, ir_node *node, ir_mode *dest_mode)
 717 {
 718         if (get_irn_mode(node) == dest_mode)
 719                 return node;
 720         return new_r_Conv(block, node, dest_mode);
 721 }
 722
 723 /**
 724  * Moves node and all predecessors of node from from_bl to to_bl.
 725  * Does not move predecessors of Phi nodes (or block nodes).
 726  */
 727 static void move(ir_node *node, ir_node *from_bl, ir_node *to_bl)
 728 {
 729         int i, arity;
 730
 731         /* move this node */
 732         set_nodes_block(node, to_bl);
 733
 734         /* move its Projs */
 735         if (get_irn_mode(node) == mode_T) {
 736                 const ir_edge_t *edge;
 737                 foreach_out_edge(node, edge) {
 738                         ir_node *proj = get_edge_src_irn(edge);
 739                         if (!is_Proj(proj))
 740                                 continue;
 741                         move(proj, from_bl, to_bl);
 742                 }
 743         }
 744
 745         /* We must not move predecessors of Phi nodes, even if they are in
 746          * from_bl. (because these are values from an earlier loop iteration
 747          * which are not predecessors of node here)
 748          */
 749         if (is_Phi(node))
 750                 return;
 751
 752         /* recursion ... */
 753         arity = get_irn_arity(node);
 754         for (i = 0; i < arity; i++) {
 755                 ir_node *pred      = get_irn_n(node, i);
 756                 ir_mode *pred_mode = get_irn_mode(pred);
 757                 if (get_nodes_block(pred) == from_bl)
 758                         move(pred, from_bl, to_bl);
 759                 if (pred_mode == env->high_signed || pred_mode == env->high_unsigned) {
 760                         ir_node *pred_low  = get_lowered_low(pred);
 761                         ir_node *pred_high = get_lowered_high(pred);
 762                         if (get_nodes_block(pred_low) == from_bl)
 763                                 move(pred_low, from_bl, to_bl);
 764                         if (pred_high != NULL && get_nodes_block(pred_high) == from_bl)
 765                                 move(pred_high, from_bl, to_bl);
 766                 }
 767         }
 768 }
 769
 770 /**
 771  * We need a custom version of part_block_edges because during transformation
 772  * not all data-dependencies are explicit yet if a lowered nodes users are not
 773  * lowered yet.
 774  * We can fix this by modifying move to look for such implicit dependencies.
 775  * Additionally we have to keep the proj_2_block map updated
 776  */
 777 static ir_node *part_block_dw(ir_node *node)
 778 {
 779         ir_graph *irg        = get_irn_irg(node);
 780         ir_node  *old_block  = get_nodes_block(node);
 781         int       n_cfgpreds = get_Block_n_cfgpreds(old_block);
 782         ir_node **cfgpreds   = get_Block_cfgpred_arr(old_block);
 783         ir_node  *new_block  = new_r_Block(irg, n_cfgpreds, cfgpreds);
 784         const ir_edge_t *edge;
 785         const ir_edge_t *next;
 786
 787         /* old_block has no predecessors anymore for now */
 788         set_irn_in(old_block, 0, NULL);
 789
 790         /* move node and its predecessors to new_block */
 791         move(node, old_block, new_block);
 792
 793         /* move Phi nodes to new_block */
 794         foreach_out_edge_safe(old_block, edge, next) {
 795                 ir_node *phi = get_edge_src_irn(edge);
 796                 if (!is_Phi(phi))
 797                         continue;
 798                 set_nodes_block(phi, new_block);
 799         }
 800         return old_block;
 801 }
 802
 803 typedef ir_node* (*new_rd_shr_func)(dbg_info *dbgi, ir_node *block,
 804                                     ir_node *left, ir_node *right,
 805                                     ir_mode *mode);
 806
 807 static void lower_shr_helper(ir_node *node, ir_mode *mode,
 808                              new_rd_shr_func new_rd_shrs)
 809 {
 810         ir_node  *right         = get_binop_right(node);
 811         ir_node  *left          = get_binop_left(node);
 812         ir_mode  *shr_mode      = get_irn_mode(node);
 813         unsigned  modulo_shift  = get_mode_modulo_shift(shr_mode);
 814         ir_mode  *low_unsigned  = env->low_unsigned;
 815         unsigned  modulo_shift2 = get_mode_modulo_shift(mode);
 816         ir_graph *irg           = get_irn_irg(node);
 817         ir_node  *left_low      = get_lowered_low(left);
 818         ir_node  *left_high     = get_lowered_high(left);
 819         dbg_info *dbgi          = get_irn_dbg_info(node);
 820         ir_node  *lower_block;
 821         ir_node  *block;
 822         ir_node  *cnst;
 823         ir_node  *and;
 824         ir_node  *cmp;
 825         ir_node  *cond;
 826         ir_node  *proj_true;
 827         ir_node  *proj_false;
 828         ir_node  *phi_low;
 829         ir_node  *phi_high;
 830         ir_node  *lower_in[2];
 831         ir_node  *phi_low_in[2];
 832         ir_node  *phi_high_in[2];
 833
 834         /* this version is optimized for modulo shift architectures
 835          * (and can't handle anything else) */
 836         if (modulo_shift != get_mode_size_bits(shr_mode)
 837                         || modulo_shift2<<1 != modulo_shift) {
 838                 panic("Shr lowering only implemented for modulo shift shr operations");
 839         }
 840         if (!is_po2(modulo_shift) || !is_po2(modulo_shift2)) {
 841                 panic("Shr lowering only implemented for power-of-2 modes");
 842         }
 843         /* without 2-complement the -x instead of (bit_width-x) trick won't work */
 844         if (get_mode_arithmetic(shr_mode) != irma_twos_complement) {
 845                 panic("Shr lowering only implemented for two-complement modes");
 846         }
 847
 848         block = get_nodes_block(node);
 849
 850         /* if the right operand is a 64bit value, we're only interested in the
 851          * lower word */
 852         if (get_irn_mode(right) == env->high_unsigned) {
 853                 right = get_lowered_low(right);
 854         } else {
 855                 /* shift should never have signed mode on the right */
 856                 assert(get_irn_mode(right) != env->high_signed);
 857                 right = create_conv(block, right, low_unsigned);
 858         }
 859
 860         lower_block = part_block_dw(node);
 861         env->flags |= CF_CHANGED;
 862         block = get_nodes_block(node);
 863
 864         /* add a Cmp to test if highest bit is set <=> whether we shift more
 865          * than half the word width */
 866         cnst       = new_r_Const_long(irg, low_unsigned, modulo_shift2);
 867         and        = new_r_And(block, right, cnst, low_unsigned);
 868         cnst       = new_r_Const(irg, get_mode_null(low_unsigned));
 869         cmp        = new_rd_Cmp(dbgi, block, and, cnst, ir_relation_equal);
 870         cond       = new_rd_Cond(dbgi, block, cmp);
 871         proj_true  = new_r_Proj(cond, mode_X, pn_Cond_true);
 872         proj_false = new_r_Proj(cond, mode_X, pn_Cond_false);
 873
 874         /* the true block => shift_width < 1word */
 875         {
 876                 /* In theory the low value (for 64bit shifts) is:
 877                  *    Or(High << (32-x)), Low >> x)
 878                  * In practice High << 32-x will fail when x is zero (since we have
 879                  * modulo shift and 32 will be 0). So instead we use:
 880                  *    Or(High<<1<<~x, Low >> x)
 881                  */
 882                 ir_node *in[1]        = { proj_true };
 883                 ir_node *block_true   = new_r_Block(irg, ARRAY_SIZE(in), in);
 884                 ir_node *res_high     = new_rd_shrs(dbgi, block_true, left_high,
 885                                                     right, mode);
 886                 ir_node *shift_low    = new_rd_Shr(dbgi, block_true, left_low, right,
 887                                                    low_unsigned);
 888                 ir_node *not_shiftval = new_rd_Not(dbgi, block_true, right,
 889                                                    low_unsigned);
 890                 ir_node *conv         = create_conv(block_true, left_high,
 891                                                     low_unsigned);
 892                 ir_node *one          = new_r_Const(irg, get_mode_one(low_unsigned));
 893                 ir_node *carry0       = new_rd_Shl(dbgi, block_true, conv, one,
 894                                                    low_unsigned);
 895                 ir_node *carry1       = new_rd_Shl(dbgi, block_true, carry0,
 896                                                    not_shiftval, low_unsigned);
 897                 ir_node *res_low      = new_rd_Or(dbgi, block_true, shift_low, carry1,
 898                                                   low_unsigned);
 899                 lower_in[0]           = new_r_Jmp(block_true);
 900                 phi_low_in[0]         = res_low;
 901                 phi_high_in[0]        = res_high;
 902         }
 903
 904         /* false block => shift_width > 1word */
 905         {
 906                 ir_node *in[1]       = { proj_false };
 907                 ir_node *block_false = new_r_Block(irg, ARRAY_SIZE(in), in);
 908                 ir_node *conv        = create_conv(block_false, left_high, low_unsigned);
 909                 ir_node *res_low     = new_rd_shrs(dbgi, block_false, conv, right,
 910                                                    low_unsigned);
 911                 int      cnsti       = modulo_shift2-1;
 912                 ir_node *cnst2       = new_r_Const_long(irg, low_unsigned, cnsti);
 913                 ir_node *res_high;
 914                 if (new_rd_shrs == new_rd_Shrs) {
 915                         res_high = new_rd_shrs(dbgi, block_false, left_high, cnst2, mode);
 916                 } else {
 917                         res_high = new_r_Const(irg, get_mode_null(mode));
 918                 }
 919                 lower_in[1]          = new_r_Jmp(block_false);
 920                 phi_low_in[1]        = res_low;
 921                 phi_high_in[1]       = res_high;
 922         }
 923
 924         /* patch lower block */
 925         set_irn_in(lower_block, ARRAY_SIZE(lower_in), lower_in);
 926         phi_low  = new_r_Phi(lower_block, ARRAY_SIZE(phi_low_in), phi_low_in,
 927                              low_unsigned);
 928         phi_high = new_r_Phi(lower_block, ARRAY_SIZE(phi_high_in), phi_high_in,
 929                              mode);
 930         ir_set_dw_lowered(node, phi_low, phi_high);
 931 }
 932
 933 static void lower_Shr(ir_node *node, ir_mode *mode)
 934 {
 935         lower_shr_helper(node, mode, new_rd_Shr);
 936 }
 937
 938 static void lower_Shrs(ir_node *node, ir_mode *mode)
 939 {
 940         lower_shr_helper(node, mode, new_rd_Shrs);
 941 }
 942
 943 static void lower_Shl(ir_node *node, ir_mode *mode)
 944 {
 945         ir_node  *right         = get_binop_right(node);
 946         ir_node  *left          = get_binop_left(node);
 947         ir_mode  *shr_mode      = get_irn_mode(node);
 948         unsigned  modulo_shift  = get_mode_modulo_shift(shr_mode);
 949         ir_mode  *low_unsigned  = env->low_unsigned;
 950         unsigned  modulo_shift2 = get_mode_modulo_shift(mode);
 951         ir_graph *irg           = get_irn_irg(node);
 952         ir_node  *left_low      = get_lowered_low(left);
 953         ir_node  *left_high     = get_lowered_high(left);
 954         dbg_info *dbgi          = get_irn_dbg_info(node);
 955         ir_node  *lower_block   = get_nodes_block(node);
 956         ir_node  *block;
 957         ir_node  *cnst;
 958         ir_node  *and;
 959         ir_node  *cmp;
 960         ir_node  *cond;
 961         ir_node  *proj_true;
 962         ir_node  *proj_false;
 963         ir_node  *phi_low;
 964         ir_node  *phi_high;
 965         ir_node  *lower_in[2];
 966         ir_node  *phi_low_in[2];
 967         ir_node  *phi_high_in[2];
 968
 969         /* this version is optimized for modulo shift architectures
 970          * (and can't handle anything else) */
 971         if (modulo_shift != get_mode_size_bits(shr_mode)
 972                         || modulo_shift2<<1 != modulo_shift) {
 973                 panic("Shl lowering only implemented for modulo shift shl operations");
 974         }
 975         if (!is_po2(modulo_shift) || !is_po2(modulo_shift2)) {
 976                 panic("Shl lowering only implemented for power-of-2 modes");
 977         }
 978         /* without 2-complement the -x instead of (bit_width-x) trick won't work */
 979         if (get_mode_arithmetic(shr_mode) != irma_twos_complement) {
 980                 panic("Shl lowering only implemented for two-complement modes");
 981         }
 982
 983         /* if the right operand is a 64bit value, we're only interested in the
 984          * lower word */
 985         if (get_irn_mode(right) == env->high_unsigned) {
 986                 right = get_lowered_low(right);
 987         } else {
 988                 /* shift should never have signed mode on the right */
 989                 assert(get_irn_mode(right) != env->high_signed);
 990                 right = create_conv(lower_block, right, low_unsigned);
 991         }
 992
 993         part_block_dw(node);
 994         env->flags |= CF_CHANGED;
 995         block = get_nodes_block(node);
 996
 997         /* add a Cmp to test if highest bit is set <=> whether we shift more
 998          * than half the word width */
 999         cnst       = new_r_Const_long(irg, low_unsigned, modulo_shift2);
1000         and        = new_r_And(block, right, cnst, low_unsigned);
1001         cnst       = new_r_Const(irg, get_mode_null(low_unsigned));
1002         cmp        = new_rd_Cmp(dbgi, block, and, cnst, ir_relation_equal);
1003         cond       = new_rd_Cond(dbgi, block, cmp);
1004         proj_true  = new_r_Proj(cond, mode_X, pn_Cond_true);
1005         proj_false = new_r_Proj(cond, mode_X, pn_Cond_false);
1006
1007         /* the true block => shift_width < 1word */
1008         {
1009                 ir_node *in[1]        = { proj_true };
1010                 ir_node *block_true   = new_r_Block(irg, ARRAY_SIZE(in), in);
1011
1012                 ir_node *res_low      = new_rd_Shl(dbgi, block_true, left_low,
1013                                                    right, low_unsigned);
1014                 ir_node *shift_high   = new_rd_Shl(dbgi, block_true, left_high, right,
1015                                                    mode);
1016                 ir_node *not_shiftval = new_rd_Not(dbgi, block_true, right,
1017                                                    low_unsigned);
1018                 ir_node *conv         = create_conv(block_true, left_low, mode);
1019                 ir_node *one          = new_r_Const(irg, get_mode_one(low_unsigned));
1020                 ir_node *carry0       = new_rd_Shr(dbgi, block_true, conv, one, mode);
1021                 ir_node *carry1       = new_rd_Shr(dbgi, block_true, carry0,
1022                                                    not_shiftval, mode);
1023                 ir_node *res_high     = new_rd_Or(dbgi, block_true, shift_high, carry1,
1024                                                   mode);
1025                 lower_in[0]           = new_r_Jmp(block_true);
1026                 phi_low_in[0]         = res_low;
1027                 phi_high_in[0]        = res_high;
1028         }
1029
1030         /* false block => shift_width > 1word */
1031         {
1032                 ir_node *in[1]       = { proj_false };
1033                 ir_node *block_false = new_r_Block(irg, ARRAY_SIZE(in), in);
1034                 ir_node *res_low     = new_r_Const(irg, get_mode_null(low_unsigned));
1035                 ir_node *conv        = create_conv(block_false, left_low, mode);
1036                 ir_node *res_high    = new_rd_Shl(dbgi, block_false, conv, right, mode);
1037                 lower_in[1]          = new_r_Jmp(block_false);
1038                 phi_low_in[1]        = res_low;
1039                 phi_high_in[1]       = res_high;
1040         }
1041
1042         /* patch lower block */
1043         set_irn_in(lower_block, ARRAY_SIZE(lower_in), lower_in);
1044         phi_low  = new_r_Phi(lower_block, ARRAY_SIZE(phi_low_in), phi_low_in,
1045                              low_unsigned);
1046         phi_high = new_r_Phi(lower_block, ARRAY_SIZE(phi_high_in), phi_high_in,
1047                              mode);
1048         ir_set_dw_lowered(node, phi_low, phi_high);
1049 }
1050
1051 /**
1052  * Rebuild Rotl nodes into Or(Shl, Shr) and prepare all nodes.
1053  */
1054 static void prepare_links_and_handle_rotl(ir_node *node, void *data)
1055 {
1056         (void) data;
1057         if (is_Rotl(node)) {
1058                 ir_mode  *mode = get_irn_op_mode(node);
1059                 ir_node  *right;
1060                 ir_node  *left, *shl, *shr, *ornode, *block, *sub, *c;
1061                 ir_mode  *omode, *rmode;
1062                 ir_graph *irg;
1063                 dbg_info *dbg;
1064                 optimization_state_t state;
1065
1066                 if (mode != env->high_signed && mode != env->high_unsigned) {
1067                         prepare_links(node);
1068                         return;
1069                 }
1070
1071                 /* replace the Rotl(x,y) by an Or(Shl(x,y), Shr(x,64-y)) */
1072                 right = get_Rotl_right(node);
1073                 irg   = get_irn_irg(node);
1074                 dbg   = get_irn_dbg_info(node);
1075                 omode = get_irn_mode(node);
1076                 left  = get_Rotl_left(node);
1077                 block = get_nodes_block(node);
1078                 shl   = new_rd_Shl(dbg, block, left, right, omode);
1079                 rmode = get_irn_mode(right);
1080                 c     = new_r_Const_long(irg, rmode, get_mode_size_bits(omode));
1081                 sub   = new_rd_Sub(dbg, block, c, right, rmode);
1082                 shr   = new_rd_Shr(dbg, block, left, sub, omode);
1083
1084                 /* switch optimization off here, or we will get the Rotl back */
1085                 save_optimization_state(&state);
1086                 set_opt_algebraic_simplification(0);
1087                 ornode = new_rd_Or(dbg, block, shl, shr, omode);
1088                 restore_optimization_state(&state);
1089
1090                 exchange(node, ornode);
1091
1092                 /* do lowering on the new nodes */
1093                 prepare_links(shl);
1094                 prepare_links(c);
1095                 prepare_links(sub);
1096                 prepare_links(shr);
1097                 prepare_links(ornode);
1098                 return;
1099         }
1100
1101         prepare_links(node);
1102 }
1103
1104 /**
1105  * Translate an Unop.
1106  *
1107  * Create an intrinsic Call.
1108  */
1109 static void lower_unop(ir_node *node, ir_mode *mode)
1110 {
1111         ir_node  *op       = get_unop_op(node);
1112         dbg_info *dbgi     = get_irn_dbg_info(node);
1113         ir_node  *block    = get_nodes_block(node);
1114         ir_graph *irg      = get_irn_irg(block);
1115         ir_type  *mtp      = mode_is_signed(mode) ? unop_tp_s : unop_tp_u;
1116         ir_op    *irop     = get_irn_op(node);
1117         ir_node  *addr     = get_intrinsic_address(mtp, irop, mode, mode);
1118         ir_node  *nomem    = get_irg_no_mem(irg);
1119         ir_node  *in[2];
1120         ir_node  *call;
1121         ir_node  *resproj;
1122
1123         if (env->params->little_endian) {
1124                 in[0] = get_lowered_low(op);
1125                 in[1] = get_lowered_high(op);
1126         } else {
1127                 in[0] = get_lowered_high(op);
1128                 in[1] = get_lowered_low(op);
1129         }
1130         call    = new_rd_Call(dbgi, block, nomem, addr, 2, in, mtp);
1131         resproj = new_r_Proj(call, mode_T, pn_Call_T_result);
1132         set_irn_pinned(call, get_irn_pinned(node));
1133
1134         if (env->params->little_endian) {
1135                 ir_node *res_low  = new_r_Proj(resproj, env->low_unsigned, 0);
1136                 ir_node *res_high = new_r_Proj(resproj, mode,              1);
1137                 ir_set_dw_lowered(node, res_low, res_high);
1138         } else {
1139                 ir_node *res_low  = new_r_Proj(resproj, env->low_unsigned, 1);
1140                 ir_node *res_high = new_r_Proj(resproj, mode,              0);
1141                 ir_set_dw_lowered(node, res_low, res_high);
1142         }
1143 }
1144
1145 /**
1146  * Translate a logical binop.
1147  *
1148  * Create two logical binops.
1149  */
1150 static void lower_binop_logical(ir_node *node, ir_mode *mode,
1151                                                                 ir_node *(*constr_rd)(dbg_info *db, ir_node *block, ir_node *op1, ir_node *op2, ir_mode *mode) )
1152 {
1153         ir_node               *left        = get_binop_left(node);
1154         ir_node               *right       = get_binop_right(node);
1155         const lower64_entry_t *left_entry  = get_node_entry(left);
1156         const lower64_entry_t *right_entry = get_node_entry(right);
1157         dbg_info              *dbgi        = get_irn_dbg_info(node);
1158         ir_node               *block       = get_nodes_block(node);
1159         ir_node               *res_low
1160                 = constr_rd(dbgi, block, left_entry->low_word, right_entry->low_word,
1161                             env->low_unsigned);
1162         ir_node               *res_high
1163                 = constr_rd(dbgi, block, left_entry->high_word, right_entry->high_word,
1164                             mode);
1165         ir_set_dw_lowered(node, res_low, res_high);
1166 }
1167
1168 static void lower_And(ir_node *node, ir_mode *mode)
1169 {
1170         lower_binop_logical(node, mode, new_rd_And);
1171 }
1172
1173 static void lower_Or(ir_node *node, ir_mode *mode)
1174 {
1175         lower_binop_logical(node, mode, new_rd_Or);
1176 }
1177
1178 static void lower_Eor(ir_node *node, ir_mode *mode)
1179 {
1180         lower_binop_logical(node, mode, new_rd_Eor);
1181 }
1182
1183 /**
1184  * Translate a Not.
1185  *
1186  * Create two logical Nots.
1187  */
1188 static void lower_Not(ir_node *node, ir_mode *mode)
1189 {
1190         ir_node               *op       = get_Not_op(node);
1191         const lower64_entry_t *op_entry = get_node_entry(op);
1192         dbg_info              *dbgi     = get_irn_dbg_info(node);
1193         ir_node               *block    = get_nodes_block(node);
1194         ir_node               *res_low
1195                 = new_rd_Not(dbgi, block, op_entry->low_word, env->low_unsigned);
1196         ir_node               *res_high
1197                 = new_rd_Not(dbgi, block, op_entry->high_word, mode);
1198         ir_set_dw_lowered(node, res_low, res_high);
1199 }
1200
1201 static bool is_equality_cmp(const ir_node *node)
1202 {
1203         ir_relation relation = get_Cmp_relation(node);
1204         ir_node    *left     = get_Cmp_left(node);
1205         ir_node    *right    = get_Cmp_right(node);
1206         ir_mode    *mode     = get_irn_mode(left);
1207
1208         /* this probably makes no sense if unordered is involved */
1209         assert(!mode_is_float(mode));
1210
1211         if (relation == ir_relation_equal || relation == ir_relation_less_greater)
1212                 return true;
1213
1214         if (!is_Const(right) || !is_Const_null(right))
1215                 return false;
1216         if (mode_is_signed(mode)) {
1217                 return relation == ir_relation_less_greater;
1218         } else {
1219                 return relation == ir_relation_greater;
1220         }
1221 }
1222
1223 static ir_node *get_cfop_destination(const ir_node *cfop)
1224 {
1225         const ir_edge_t *first = get_irn_out_edge_first(cfop);
1226         /* we should only have 1 destination */
1227         assert(get_irn_n_edges(cfop) == 1);
1228         return get_edge_src_irn(first);
1229 }
1230
1231 static void lower_Switch(ir_node *node, ir_mode *high_mode)
1232 {
1233         ir_node *selector = get_Switch_selector(node);
1234         ir_mode *mode     = get_irn_mode(selector);
1235         (void)high_mode;
1236         if (mode == env->high_signed || mode == env->high_unsigned) {
1237                 /* we can't really handle Switch with 64bit offsets */
1238                 panic("Switch with 64bit jumptable not supported");
1239         }
1240         lower_node(selector);
1241 }
1242
1243 /**
1244  * Translate a Cond.
1245  */
1246 static void lower_Cond(ir_node *node, ir_mode *high_mode)
1247 {
1248         ir_node *left, *right, *block;
1249         ir_node *sel = get_Cond_selector(node);
1250         ir_mode *cmp_mode;
1251         const lower64_entry_t *lentry, *rentry;
1252         ir_node  *projT = NULL, *projF = NULL;
1253         ir_node  *new_bl, *irn;
1254         ir_node  *projHF, *projHT;
1255         ir_node  *dst_blk;
1256         ir_relation relation;
1257         ir_graph *irg;
1258         dbg_info *dbg;
1259         const ir_edge_t *edge;
1260         const ir_edge_t *next;
1261
1262         (void) high_mode;
1263
1264         if (!is_Cmp(sel)) {
1265                 lower_node(sel);
1266                 return;
1267         }
1268
1269         left     = get_Cmp_left(sel);
1270         cmp_mode = get_irn_mode(left);
1271         if (cmp_mode != env->high_signed && cmp_mode != env->high_unsigned) {
1272                 lower_node(sel);
1273                 return;
1274         }
1275
1276         right  = get_Cmp_right(sel);
1277         lower_node(left);
1278         lower_node(right);
1279         lentry = get_node_entry(left);
1280         rentry = get_node_entry(right);
1281
1282         /* all right, build the code */
1283         foreach_out_edge_safe(node, edge, next) {
1284                 ir_node *proj    = get_edge_src_irn(edge);
1285                 long     proj_nr;
1286                 if (!is_Proj(proj))
1287                         continue;
1288                 proj_nr = get_Proj_proj(proj);
1289
1290                 if (proj_nr == pn_Cond_true) {
1291                         assert(projT == NULL && "more than one Proj(true)");
1292                         projT = proj;
1293                 } else {
1294                         assert(proj_nr == pn_Cond_false);
1295                         assert(projF == NULL && "more than one Proj(false)");
1296                         projF = proj;
1297                 }
1298                 mark_irn_visited(proj);
1299         }
1300         assert(projT && projF);
1301
1302         /* create a new high compare */
1303         block    = get_nodes_block(node);
1304         irg      = get_Block_irg(block);
1305         dbg      = get_irn_dbg_info(sel);
1306         relation = get_Cmp_relation(sel);
1307
1308         if (is_equality_cmp(sel)) {
1309                 /* x ==/!= y ==> or(x_low^y_low,x_high^y_high) ==/!= 0 */
1310                 ir_mode *mode       = env->low_unsigned;
1311                 ir_node *low_left   = new_rd_Conv(dbg, block, lentry->low_word, mode);
1312                 ir_node *high_left  = new_rd_Conv(dbg, block, lentry->high_word, mode);
1313                 ir_node *low_right  = new_rd_Conv(dbg, block, rentry->low_word, mode);
1314                 ir_node *high_right = new_rd_Conv(dbg, block, rentry->high_word, mode);
1315                 ir_node *xor_low    = new_rd_Eor(dbg, block, low_left, low_right, mode);
1316                 ir_node *xor_high   = new_rd_Eor(dbg, block, high_left, high_right, mode);
1317                 ir_node *ornode = new_rd_Or(dbg, block, xor_low, xor_high, mode);
1318                 ir_node *cmp    = new_rd_Cmp(dbg, block, ornode, new_r_Const(irg, get_mode_null(mode)), relation);
1319                 set_Cond_selector(node, cmp);
1320                 return;
1321         }
1322
1323         if (relation == ir_relation_equal) {
1324                 ir_node *proj;
1325                 /* simple case:a == b <==> a_h == b_h && a_l == b_l */
1326                 dst_blk = get_cfop_destination(projF);
1327
1328                 irn = new_rd_Cmp(dbg, block, lentry->high_word, rentry->high_word,
1329                                  ir_relation_equal);
1330                 dbg = get_irn_dbg_info(node);
1331                 irn = new_rd_Cond(dbg, block, irn);
1332
1333                 projHF = new_r_Proj(irn, mode_X, pn_Cond_false);
1334                 mark_irn_visited(projHF);
1335                 exchange(projF, projHF);
1336
1337                 projHT = new_r_Proj(irn, mode_X, pn_Cond_true);
1338                 mark_irn_visited(projHT);
1339
1340                 new_bl = new_r_Block(irg, 1, &projHT);
1341
1342                 dbg = get_irn_dbg_info(sel);
1343                 irn = new_rd_Cmp(dbg, new_bl, lentry->low_word, rentry->low_word,
1344                                   ir_relation_equal);
1345                 dbg = get_irn_dbg_info(node);
1346                 irn = new_rd_Cond(dbg, new_bl, irn);
1347
1348                 proj = new_r_Proj(irn, mode_X, pn_Cond_false);
1349                 mark_irn_visited(proj);
1350                 add_block_cf_input(dst_blk, projHF, proj);
1351
1352                 proj = new_r_Proj(irn, mode_X, pn_Cond_true);
1353                 mark_irn_visited(proj);
1354                 exchange(projT, proj);
1355         } else if (relation == ir_relation_less_greater) {
1356                 ir_node *proj;
1357                 /* simple case:a != b <==> a_h != b_h || a_l != b_l */
1358                 dst_blk = get_cfop_destination(projT);
1359
1360                 irn = new_rd_Cmp(dbg, block, lentry->high_word, rentry->high_word,
1361                                  ir_relation_less_greater);
1362                 dbg = get_irn_dbg_info(node);
1363                 irn = new_rd_Cond(dbg, block, irn);
1364
1365                 projHT = new_r_Proj(irn, mode_X, pn_Cond_true);
1366                 mark_irn_visited(projHT);
1367                 exchange(projT, projHT);
1368
1369                 projHF = new_r_Proj(irn, mode_X, pn_Cond_false);
1370                 mark_irn_visited(projHF);
1371
1372                 new_bl = new_r_Block(irg, 1, &projHF);
1373
1374                 dbg = get_irn_dbg_info(sel);
1375                 irn = new_rd_Cmp(dbg, new_bl, lentry->low_word, rentry->low_word,
1376                                  ir_relation_less_greater);
1377                 dbg = get_irn_dbg_info(node);
1378                 irn = new_rd_Cond(dbg, new_bl, irn);
1379
1380                 proj = new_r_Proj(irn, mode_X, pn_Cond_true);
1381                 mark_irn_visited(proj);
1382                 add_block_cf_input(dst_blk, projHT, proj);
1383
1384                 proj = new_r_Proj(irn, mode_X, pn_Cond_false);
1385                 mark_irn_visited(proj);
1386                 exchange(projF, proj);
1387         } else {
1388                 ir_node *proj;
1389                 /* a rel b <==> a_h REL b_h || (a_h == b_h && a_l rel b_l) */
1390                 ir_node *dstT, *dstF, *newbl_eq, *newbl_l;
1391                 ir_node *projEqF;
1392
1393                 dstT = get_cfop_destination(projT);
1394                 dstF = get_cfop_destination(projF);
1395
1396                 irn = new_rd_Cmp(dbg, block, lentry->high_word, rentry->high_word,
1397                                  relation & ~ir_relation_equal);
1398                 dbg = get_irn_dbg_info(node);
1399                 irn = new_rd_Cond(dbg, block, irn);
1400
1401                 projHT = new_r_Proj(irn, mode_X, pn_Cond_true);
1402                 mark_irn_visited(projHT);
1403
1404                 projHF = new_r_Proj(irn, mode_X, pn_Cond_false);
1405                 mark_irn_visited(projHF);
1406
1407                 newbl_eq = new_r_Block(irg, 1, &projHF);
1408
1409                 irn = new_rd_Cmp(dbg, block, lentry->high_word, rentry->high_word,
1410                                  ir_relation_equal);
1411                 irn = new_rd_Cond(dbg, newbl_eq, irn);
1412
1413                 projEqF = new_r_Proj(irn, mode_X, pn_Cond_false);
1414                 mark_irn_visited(projEqF);
1415
1416                 proj = new_r_Proj(irn, mode_X, pn_Cond_true);
1417                 mark_irn_visited(proj);
1418
1419                 newbl_l = new_r_Block(irg, 1, &proj);
1420
1421                 dbg = get_irn_dbg_info(sel);
1422                 irn = new_rd_Cmp(dbg, newbl_l, lentry->low_word, rentry->low_word,
1423                                  relation);
1424                 dbg = get_irn_dbg_info(node);
1425                 irn = new_rd_Cond(dbg, newbl_l, irn);
1426
1427                 proj = new_r_Proj(irn, mode_X, pn_Cond_true);
1428                 mark_irn_visited(proj);
1429                 add_block_cf_input(dstT, projT, proj);
1430
1431                 proj = new_r_Proj(irn, mode_X, pn_Cond_false);
1432                 mark_irn_visited(proj);
1433                 add_block_cf_input(dstF, projF, proj);
1434
1435                 exchange(projT, projHT);
1436                 exchange(projF, projEqF);
1437         }
1438
1439         /* we have changed the control flow */
1440         env->flags |= CF_CHANGED;
1441 }
1442
1443 /**
1444  * Translate a Conv to higher_signed
1445  */
1446 static void lower_Conv_to_Ll(ir_node *node)
1447 {
1448         ir_mode  *omode        = get_irn_mode(node);
1449         ir_node  *op           = get_Conv_op(node);
1450         ir_mode  *imode        = get_irn_mode(op);
1451         ir_graph *irg          = get_irn_irg(node);
1452         ir_node  *block        = get_nodes_block(node);
1453         dbg_info *dbg          = get_irn_dbg_info(node);
1454         ir_node  *res_low;
1455         ir_node  *res_high;
1456
1457         ir_mode  *low_unsigned = env->low_unsigned;
1458         ir_mode  *low_signed
1459                 = mode_is_signed(omode) ? env->low_signed : low_unsigned;
1460
1461         if (mode_is_int(imode) || mode_is_reference(imode)) {
1462                 if (imode == env->high_signed || imode == env->high_unsigned) {
1463                         /* a Conv from Lu to Ls or Ls to Lu */
1464                         const lower64_entry_t *op_entry = get_node_entry(op);
1465                         res_low  = op_entry->low_word;
1466                         res_high = new_rd_Conv(dbg, block, op_entry->high_word, low_signed);
1467                 } else {
1468                         /* simple case: create a high word */
1469                         if (imode != low_unsigned)
1470                                 op = new_rd_Conv(dbg, block, op, low_unsigned);
1471
1472                         res_low = op;
1473
1474                         if (mode_is_signed(imode)) {
1475                                 int      c       = get_mode_size_bits(low_signed) - 1;
1476                                 ir_node *cnst    = new_r_Const_long(irg, low_unsigned, c);
1477                                 if (get_irn_mode(op) != low_signed)
1478                                         op = new_rd_Conv(dbg, block, op, low_signed);
1479                                 res_high = new_rd_Shrs(dbg, block, op, cnst, low_signed);
1480                         } else {
1481                                 res_high = new_r_Const(irg, get_mode_null(low_signed));
1482                         }
1483                 }
1484         } else if (imode == mode_b) {
1485                 res_low  = new_rd_Conv(dbg, block, op, low_unsigned);
1486                 res_high = new_r_Const(irg, get_mode_null(low_signed));
1487         } else {
1488                 ir_node *irn, *call;
1489                 ir_type *mtp = get_conv_type(imode, omode);
1490
1491                 irn = get_intrinsic_address(mtp, get_irn_op(node), imode, omode);
1492                 call = new_rd_Call(dbg, block, get_irg_no_mem(irg), irn, 1, &op, mtp);
1493                 set_irn_pinned(call, get_irn_pinned(node));
1494                 irn = new_r_Proj(call, mode_T, pn_Call_T_result);
1495
1496                 res_low  = new_r_Proj(irn, low_unsigned, 0);
1497                 res_high = new_r_Proj(irn, low_signed, 1);
1498         }
1499         ir_set_dw_lowered(node, res_low, res_high);
1500 }
1501
1502 /**
1503  * Translate a Conv from higher_unsigned
1504  */
1505 static void lower_Conv_from_Ll(ir_node *node)
1506 {
1507         ir_node               *op    = get_Conv_op(node);
1508         ir_mode               *omode = get_irn_mode(node);
1509         ir_node               *block = get_nodes_block(node);
1510         dbg_info              *dbg   = get_irn_dbg_info(node);
1511         ir_graph              *irg   = get_irn_irg(node);
1512         const lower64_entry_t *entry = get_node_entry(op);
1513
1514         if (mode_is_int(omode) || mode_is_reference(omode)) {
1515                 op = entry->low_word;
1516
1517                 /* simple case: create a high word */
1518                 if (omode != env->low_unsigned)
1519                         op = new_rd_Conv(dbg, block, op, omode);
1520
1521                 set_Conv_op(node, op);
1522         } else if (omode == mode_b) {
1523                 /* llu ? true : false  <=> (low|high) ? true : false */
1524                 ir_mode *mode   = env->low_unsigned;
1525                 ir_node *ornode = new_rd_Or(dbg, block, entry->low_word,
1526                                             entry->high_word, mode);
1527                 set_Conv_op(node, ornode);
1528         } else {
1529                 ir_node *irn, *call, *in[2];
1530                 ir_mode *imode = get_irn_mode(op);
1531                 ir_type *mtp   = get_conv_type(imode, omode);
1532                 ir_node *res;
1533
1534                 irn   = get_intrinsic_address(mtp, get_irn_op(node), imode, omode);
1535                 in[0] = entry->low_word;
1536                 in[1] = entry->high_word;
1537
1538                 call = new_rd_Call(dbg, block, get_irg_no_mem(irg), irn, 2, in, mtp);
1539                 set_irn_pinned(call, get_irn_pinned(node));
1540                 irn = new_r_Proj(call, mode_T, pn_Call_T_result);
1541                 res = new_r_Proj(irn, omode, 0);
1542
1543                 exchange(node, res);
1544         }
1545 }
1546
1547 /**
1548  * lower Cmp
1549  */
1550 static void lower_Cmp(ir_node *cmp, ir_mode *m)
1551 {
1552         ir_node  *l        = get_Cmp_left(cmp);
1553         ir_mode  *cmp_mode = get_irn_mode(l);
1554         ir_node  *r, *low, *high, *t, *res;
1555         ir_relation relation;
1556         ir_node  *block;
1557         dbg_info *dbg;
1558         const lower64_entry_t *lentry;
1559         const lower64_entry_t *rentry;
1560         (void) m;
1561
1562         if (cmp_mode != env->high_signed && cmp_mode != env->high_unsigned)
1563                 return;
1564
1565         r        = get_Cmp_right(cmp);
1566         lentry   = get_node_entry(l);
1567         rentry   = get_node_entry(r);
1568         relation = get_Cmp_relation(cmp);
1569         block    = get_nodes_block(cmp);
1570         dbg      = get_irn_dbg_info(cmp);
1571
1572         /* easy case for x ==/!= 0 (see lower_Cond for details) */
1573         if (is_equality_cmp(cmp)) {
1574                 ir_graph *irg        = get_irn_irg(cmp);
1575                 ir_mode  *mode       = env->low_unsigned;
1576                 ir_node  *low_left   = new_rd_Conv(dbg, block, lentry->low_word, mode);
1577                 ir_node  *high_left  = new_rd_Conv(dbg, block, lentry->high_word, mode);
1578                 ir_node  *low_right  = new_rd_Conv(dbg, block, rentry->low_word, mode);
1579                 ir_node  *high_right = new_rd_Conv(dbg, block, rentry->high_word, mode);
1580                 ir_node  *xor_low    = new_rd_Eor(dbg, block, low_left, low_right, mode);
1581                 ir_node  *xor_high   = new_rd_Eor(dbg, block, high_left, high_right, mode);
1582                 ir_node  *ornode     = new_rd_Or(dbg, block, xor_low, xor_high, mode);
1583                 ir_node  *new_cmp    = new_rd_Cmp(dbg, block, ornode, new_r_Const(irg, get_mode_null(mode)), relation);
1584                 exchange(cmp, new_cmp);
1585                 return;
1586         }
1587
1588         if (relation == ir_relation_equal) {
1589                 /* simple case:a == b <==> a_h == b_h && a_l == b_l */
1590                 low  = new_rd_Cmp(dbg, block, lentry->low_word, rentry->low_word,
1591                                   relation);
1592                 high = new_rd_Cmp(dbg, block, lentry->high_word, rentry->high_word,
1593                                   relation);
1594                 res  = new_rd_And(dbg, block, low, high, mode_b);
1595         } else if (relation == ir_relation_less_greater) {
1596                 /* simple case:a != b <==> a_h != b_h || a_l != b_l */
1597                 low  = new_rd_Cmp(dbg, block, lentry->low_word, rentry->low_word,
1598                                   relation);
1599                 high = new_rd_Cmp(dbg, block, lentry->high_word, rentry->high_word,
1600                                   relation);
1601                 res = new_rd_Or(dbg, block, low, high, mode_b);
1602         } else {
1603                 /* a rel b <==> a_h REL b_h || (a_h == b_h && a_l rel b_l) */
1604                 ir_node *high1 = new_rd_Cmp(dbg, block, lentry->high_word,
1605                         rentry->high_word, relation & ~ir_relation_equal);
1606                 low  = new_rd_Cmp(dbg, block, lentry->low_word, rentry->low_word,
1607                                   relation);
1608                 high = new_rd_Cmp(dbg, block, lentry->high_word, rentry->high_word,
1609                                   ir_relation_equal);
1610                 t = new_rd_And(dbg, block, low, high, mode_b);
1611                 res = new_rd_Or(dbg, block, high1, t, mode_b);
1612         }
1613         exchange(cmp, res);
1614 }
1615
1616 /**
1617  * Translate a Conv.
1618  */
1619 static void lower_Conv(ir_node *node, ir_mode *mode)
1620 {
1621         mode = get_irn_mode(node);
1622
1623         if (mode == env->high_signed || mode == env->high_unsigned) {
1624                 lower_Conv_to_Ll(node);
1625         } else {
1626                 ir_mode *op_mode = get_irn_mode(get_Conv_op(node));
1627
1628                 if (op_mode == env->high_signed || op_mode == env->high_unsigned) {
1629                         lower_Conv_from_Ll(node);
1630                 }
1631         }
1632 }
1633
1634 static void fix_parameter_entities(ir_graph *irg)
1635 {
1636         ir_entity *entity   = get_irg_entity(irg);
1637         ir_type   *mtp      = get_entity_type(entity);
1638         ir_type   *orig_mtp = get_type_link(mtp);
1639
1640         size_t      orig_n_params      = get_method_n_params(orig_mtp);
1641         ir_entity **parameter_entities;
1642
1643         parameter_entities = ALLOCANZ(ir_entity*, orig_n_params);
1644
1645         ir_type *frame_type = get_irg_frame_type(irg);
1646         size_t   n          = get_compound_n_members(frame_type);
1647         size_t   i;
1648         size_t   n_param;
1649
1650         /* collect parameter entities */
1651         for (i = 0; i < n; ++i) {
1652                 ir_entity *entity = get_compound_member(frame_type, i);
1653                 size_t     p;
1654                 if (!is_parameter_entity(entity))
1655                         continue;
1656                 p = get_entity_parameter_number(entity);
1657                 if (p == IR_VA_START_PARAMETER_NUMBER)
1658                         continue;
1659                 assert(p < orig_n_params);
1660                 assert(parameter_entities[p] == NULL);
1661                 parameter_entities[p] = entity;
1662         }
1663
1664         /* adjust indices */
1665         n_param = 0;
1666         for (i = 0; i < orig_n_params; ++i, ++n_param) {
1667                 ir_entity *entity = parameter_entities[i];
1668                 ir_type   *tp;
1669
1670                 if (entity != NULL)
1671                         set_entity_parameter_number(entity, n_param);
1672
1673                 tp = get_method_param_type(orig_mtp, i);
1674                 if (is_Primitive_type(tp)) {
1675                         ir_mode *mode = get_type_mode(tp);
1676                         if (mode == env->high_signed || mode == env->high_unsigned) {
1677                                 ++n_param;
1678                                 /* note that we do not change the type of the parameter
1679                                  * entities, as calling convention fixup later still needs to
1680                                  * know which is/was a lowered doubleword.
1681                                  * So we just mark/remember it for later */
1682                                 if (entity != NULL) {
1683                                         assert(entity->attr.parameter.doubleword_low_mode == NULL);
1684                                         entity->attr.parameter.doubleword_low_mode
1685                                                 = env->low_unsigned;
1686                                 }
1687                         }
1688                 }
1689         }
1690 }
1691
1692 /**
1693  * Lower the method type.
1694  *
1695  * @param env  the lower environment
1696  * @param mtp  the method type to lower
1697  *
1698  * @return the lowered type
1699  */
1700 static ir_type *lower_mtp(ir_type *mtp)
1701 {
1702         ir_type *res;
1703         size_t   i;
1704         size_t   orig_n_params;
1705         size_t   orig_n_res;
1706         size_t   n_param;
1707         size_t   n_res;
1708         bool     must_be_lowered;
1709
1710         res = (ir_type*)pmap_get(lowered_type, mtp);
1711         if (res != NULL)
1712                 return res;
1713
1714         orig_n_params   = get_method_n_params(mtp);
1715         orig_n_res      = get_method_n_ress(mtp);
1716         n_param         = orig_n_params;
1717         n_res           = orig_n_res;
1718         must_be_lowered = false;
1719
1720         /* count new number of params */
1721         for (i = orig_n_params; i > 0;) {
1722                 ir_type *tp = get_method_param_type(mtp, --i);
1723
1724                 if (is_Primitive_type(tp)) {
1725                         ir_mode *mode = get_type_mode(tp);
1726
1727                         if (mode == env->high_signed || mode == env->high_unsigned) {
1728                                 ++n_param;
1729                                 must_be_lowered = true;
1730                         }
1731                 }
1732         }
1733
1734         /* count new number of results */
1735         for (i = orig_n_res; i > 0;) {
1736                 ir_type *tp = get_method_res_type(mtp, --i);
1737
1738                 if (is_Primitive_type(tp)) {
1739                         ir_mode *mode = get_type_mode(tp);
1740
1741                         if (mode == env->high_signed || mode == env->high_unsigned) {
1742                                 ++n_res;
1743                                 must_be_lowered = true;
1744                         }
1745                 }
1746         }
1747         if (!must_be_lowered) {
1748                 set_type_link(mtp, NULL);
1749                 return mtp;
1750         }
1751
1752         res = new_d_type_method(n_param, n_res, get_type_dbg_info(mtp));
1753
1754         /* set param types and result types */
1755         for (i = n_param = 0; i < orig_n_params; ++i) {
1756                 ir_type *tp = get_method_param_type(mtp, i);
1757
1758                 if (is_Primitive_type(tp)) {
1759                         ir_mode *mode = get_type_mode(tp);
1760
1761                         if (mode == env->high_signed) {
1762                                 if (env->params->little_endian) {
1763                                         set_method_param_type(res, n_param++, tp_u);
1764                                         set_method_param_type(res, n_param++, tp_s);
1765                                 } else {
1766                                         set_method_param_type(res, n_param++, tp_s);
1767                                         set_method_param_type(res, n_param++, tp_u);
1768                                 }
1769                         } else if (mode == env->high_unsigned) {
1770                                 set_method_param_type(res, n_param++, tp_u);
1771                                 set_method_param_type(res, n_param++, tp_u);
1772                         } else {
1773                                 set_method_param_type(res, n_param, tp);
1774                                 ++n_param;
1775                         }
1776                 } else {
1777                         set_method_param_type(res, n_param, tp);
1778                         ++n_param;
1779                 }
1780         }
1781         for (i = n_res = 0; i < orig_n_res; ++i) {
1782                 ir_type *tp = get_method_res_type(mtp, i);
1783
1784                 if (is_Primitive_type(tp)) {
1785                         ir_mode *mode = get_type_mode(tp);
1786
1787                         if (mode == env->high_signed) {
1788                                 if (env->params->little_endian) {
1789                                         set_method_res_type(res, n_res++, tp_u);
1790                                         set_method_res_type(res, n_res++, tp_s);
1791                                 } else {
1792                                         set_method_res_type(res, n_res++, tp_s);
1793                                         set_method_res_type(res, n_res++, tp_u);
1794                                 }
1795                         } else if (mode == env->high_unsigned) {
1796                                 set_method_res_type(res, n_res++, tp_u);
1797                                 set_method_res_type(res, n_res++, tp_u);
1798                         } else {
1799                                 set_method_res_type(res, n_res++, tp);
1800                         }
1801                 } else {
1802                         set_method_res_type(res, n_res++, tp);
1803                 }
1804         }
1805
1806         set_method_variadicity(res, get_method_variadicity(mtp));
1807         set_method_calling_convention(res, get_method_calling_convention(mtp));
1808         set_method_additional_properties(res, get_method_additional_properties(mtp));
1809
1810         set_higher_type(res, mtp);
1811         set_type_link(res, mtp);
1812
1813         pmap_insert(lowered_type, mtp, res);
1814         return res;
1815 }
1816
1817 /**
1818  * Translate a Return.
1819  */
1820 static void lower_Return(ir_node *node, ir_mode *mode)
1821 {
1822         ir_graph  *irg = get_irn_irg(node);
1823         ir_entity *ent = get_irg_entity(irg);
1824         ir_type   *mtp = get_entity_type(ent);
1825         ir_node  **in;
1826         size_t     i, j, n;
1827         int        need_conv = 0;
1828         (void) mode;
1829
1830         /* check if this return must be lowered */
1831         for (i = 0, n = get_Return_n_ress(node); i < n; ++i) {
1832                 ir_node *pred  = get_Return_res(node, i);
1833                 ir_mode *rmode = get_irn_op_mode(pred);
1834
1835                 if (rmode == env->high_signed || rmode == env->high_unsigned)
1836                         need_conv = 1;
1837         }
1838         if (! need_conv)
1839                 return;
1840
1841         ent = get_irg_entity(irg);
1842         mtp = get_entity_type(ent);
1843
1844         /* create a new in array */
1845         NEW_ARR_A(ir_node *, in, get_method_n_ress(mtp) + 1);
1846         j = 0;
1847         in[j++] = get_Return_mem(node);
1848
1849         for (i = 0, n = get_Return_n_ress(node); i < n; ++i) {
1850                 ir_node *pred      = get_Return_res(node, i);
1851                 ir_mode *pred_mode = get_irn_mode(pred);
1852
1853                 if (pred_mode == env->high_signed || pred_mode == env->high_unsigned) {
1854                         const lower64_entry_t *entry = get_node_entry(pred);
1855                         if (env->params->little_endian) {
1856                                 in[j++] = entry->low_word;
1857                                 in[j++] = entry->high_word;
1858                         } else {
1859                                 in[j++] = entry->high_word;
1860                                 in[j++] = entry->low_word;
1861                         }
1862                 } else {
1863                         in[j++] = pred;
1864                 }
1865         }
1866         assert(j == get_method_n_ress(mtp)+1);
1867
1868         set_irn_in(node, j, in);
1869 }
1870
1871 /**
1872  * Translate the parameters.
1873  */
1874 static void lower_Start(ir_node *node, ir_mode *high_mode)
1875 {
1876         ir_graph  *irg      = get_irn_irg(node);
1877         ir_entity *ent      = get_irg_entity(irg);
1878         ir_type   *mtp      = get_entity_type(ent);
1879         ir_type   *orig_mtp = get_type_link(mtp);
1880         ir_node   *args;
1881         long      *new_projs;
1882         size_t    i, j, n_params;
1883         const ir_edge_t *edge;
1884         const ir_edge_t *next;
1885         (void) high_mode;
1886
1887         /* if type link is NULL then the type was not lowered, hence no changes
1888          * at Start necessary */
1889         if (orig_mtp == NULL)
1890                 return;
1891
1892         n_params = get_method_n_params(orig_mtp);
1893
1894         NEW_ARR_A(long, new_projs, n_params);
1895
1896         /* Calculate mapping of proj numbers in new_projs */
1897         for (i = j = 0; i < n_params; ++i, ++j) {
1898                 ir_type *ptp = get_method_param_type(orig_mtp, i);
1899
1900                 new_projs[i] = j;
1901                 if (is_Primitive_type(ptp)) {
1902                         ir_mode *amode = get_type_mode(ptp);
1903                         if (amode == env->high_signed || amode == env->high_unsigned)
1904                                 ++j;
1905                 }
1906         }
1907
1908         /* lower method type */
1909         args = NULL;
1910         foreach_out_edge(node, edge) {
1911                 ir_node *proj = get_edge_src_irn(edge);
1912                 if (!is_Proj(proj))
1913                         continue;
1914                 if (get_Proj_proj(proj) == pn_Start_T_args) {
1915                         args = proj;
1916                         break;
1917                 }
1918         }
1919         if (args == NULL)
1920                 return;
1921
1922         /* fix all Proj's and create new ones */
1923         foreach_out_edge_safe(args, edge, next) {
1924                 ir_node *proj   = get_edge_src_irn(edge);
1925                 ir_mode *mode   = get_irn_mode(proj);
1926                 ir_mode *mode_l = env->low_unsigned;
1927                 ir_node *pred;
1928                 long     proj_nr;
1929                 ir_mode *mode_h;
1930                 ir_node *res_low;
1931                 ir_node *res_high;
1932                 int      old_cse;
1933                 dbg_info *dbg;
1934
1935                 if (!is_Proj(proj))
1936                         continue;
1937                 pred    = get_Proj_pred(proj);
1938                 proj_nr = get_Proj_proj(proj);
1939
1940                 if (mode == env->high_signed) {
1941                         mode_h = env->low_signed;
1942                 } else if (mode == env->high_unsigned) {
1943                         mode_h = env->low_unsigned;
1944                 } else {
1945                         long new_pn = new_projs[proj_nr];
1946                         set_Proj_proj(proj, new_pn);
1947                         continue;
1948                 }
1949
1950                 /* Switch off CSE or we might get an already existing Proj. */
1951                 old_cse = get_opt_cse();
1952                 set_opt_cse(0);
1953                 dbg = get_irn_dbg_info(proj);
1954                 if (env->params->little_endian) {
1955                         res_low  = new_rd_Proj(dbg, pred, mode_l, new_projs[proj_nr]);
1956                         res_high = new_rd_Proj(dbg, pred, mode_h, new_projs[proj_nr] + 1);
1957                 } else {
1958                         res_high = new_rd_Proj(dbg, pred, mode_h, new_projs[proj_nr]);
1959                         res_low  = new_rd_Proj(dbg, pred, mode_l, new_projs[proj_nr] + 1);
1960                 }
1961                 set_opt_cse(old_cse);
1962                 ir_set_dw_lowered(proj, res_low, res_high);
1963         }
1964 }
1965
1966 /**
1967  * Translate a Call.
1968  */
1969 static void lower_Call(ir_node *node, ir_mode *mode)
1970 {
1971         ir_type  *tp = get_Call_type(node);
1972         ir_node  **in;
1973         size_t   n_params, n_res;
1974         bool     need_lower = false;
1975         size_t   i, j;
1976         size_t   p;
1977         long     *res_numbers = NULL;
1978         ir_node  *resproj;
1979         const ir_edge_t *edge;
1980         const ir_edge_t *next;
1981         (void) mode;
1982
1983         n_params = get_method_n_params(tp);
1984         for (p = 0; p < n_params; ++p) {
1985                 ir_type *ptp = get_method_param_type(tp, p);
1986
1987                 if (is_Primitive_type(ptp)) {
1988                         ir_mode *pmode = get_type_mode(ptp);
1989                         if (pmode == env->high_signed || pmode == env->high_unsigned) {
1990                                 need_lower = true;
1991                                 break;
1992                         }
1993                 }
1994         }
1995         n_res = get_method_n_ress(tp);
1996         if (n_res > 0) {
1997                 NEW_ARR_A(long, res_numbers, n_res);
1998
1999                 for (i = j = 0; i < n_res; ++i, ++j) {
2000                         ir_type *ptp = get_method_res_type(tp, i);
2001
2002                         res_numbers[i] = j;
2003                         if (is_Primitive_type(ptp)) {
2004                                 ir_mode *rmode = get_type_mode(ptp);
2005                                 if (rmode == env->high_signed || rmode == env->high_unsigned) {
2006                                         need_lower = true;
2007                                         ++j;
2008                                 }
2009                         }
2010                 }
2011         }
2012
2013         if (! need_lower)
2014                 return;
2015
2016         /* let's lower it */
2017         tp = lower_mtp(tp);
2018         set_Call_type(node, tp);
2019
2020         NEW_ARR_A(ir_node *, in, get_method_n_params(tp) + 2);
2021
2022         in[0] = get_Call_mem(node);
2023         in[1] = get_Call_ptr(node);
2024
2025         for (j = 2, i = 0; i < n_params; ++i) {
2026                 ir_node *pred      = get_Call_param(node, i);
2027                 ir_mode *pred_mode = get_irn_mode(pred);
2028
2029                 if (pred_mode == env->high_signed || pred_mode == env->high_unsigned) {
2030                         const lower64_entry_t *pred_entry = get_node_entry(pred);
2031                         if (env->params->little_endian) {
2032                                 in[j++] = pred_entry->low_word;
2033                                 in[j++] = pred_entry->high_word;
2034                         } else {
2035                                 in[j++] = pred_entry->high_word;
2036                                 in[j++] = pred_entry->low_word;
2037                         }
2038                 } else {
2039                         in[j++] = pred;
2040                 }
2041         }
2042
2043         set_irn_in(node, j, in);
2044
2045         /* find results T */
2046         resproj = NULL;
2047         foreach_out_edge(node, edge) {
2048                 ir_node *proj = get_edge_src_irn(edge);
2049                 if (!is_Proj(proj))
2050                         continue;
2051                 if (get_Proj_proj(proj) == pn_Call_T_result) {
2052                         resproj = proj;
2053                         break;
2054                 }
2055         }
2056         if (resproj == NULL)
2057                 return;
2058
2059         /* fix the results */
2060         foreach_out_edge_safe(resproj, edge, next) {
2061                 ir_node  *proj      = get_edge_src_irn(edge);
2062                 ir_mode  *proj_mode = get_irn_mode(proj);
2063                 ir_mode  *mode_l    = env->low_unsigned;
2064                 ir_node  *pred;
2065                 long      proj_nr;
2066                 ir_mode  *mode_h;
2067                 ir_node  *res_low;
2068                 ir_node  *res_high;
2069                 dbg_info *dbg;
2070
2071                 if (!is_Proj(proj))
2072                         continue;
2073                 pred    = get_Proj_pred(proj);
2074                 proj_nr = get_Proj_proj(proj);
2075
2076                 if (proj_mode == env->high_signed) {
2077                         mode_h = env->low_signed;
2078                 } else if (proj_mode == env->high_unsigned) {
2079                         mode_h = env->low_unsigned;
2080                 } else {
2081                         long new_nr = res_numbers[proj_nr];
2082                         set_Proj_proj(proj, new_nr);
2083                         continue;
2084                 }
2085
2086                 dbg = get_irn_dbg_info(proj);
2087                 if (env->params->little_endian) {
2088                         res_low  = new_rd_Proj(dbg, pred, mode_l, res_numbers[proj_nr]);
2089                         res_high = new_rd_Proj(dbg, pred, mode_h, res_numbers[proj_nr] + 1);
2090                 } else {
2091                         res_high = new_rd_Proj(dbg, pred, mode_h, res_numbers[proj_nr]);
2092                         res_low  = new_rd_Proj(dbg, pred, mode_l, res_numbers[proj_nr] + 1);
2093                 }
2094                 ir_set_dw_lowered(proj, res_low, res_high);
2095         }
2096 }
2097
2098 /**
2099  * Translate an Unknown into two.
2100  */
2101 static void lower_Unknown(ir_node *node, ir_mode *mode)
2102 {
2103         ir_mode  *low_mode = env->low_unsigned;
2104         ir_graph *irg      = get_irn_irg(node);
2105         ir_node  *res_low  = new_r_Unknown(irg, low_mode);
2106         ir_node  *res_high = new_r_Unknown(irg, mode);
2107         ir_set_dw_lowered(node, res_low, res_high);
2108 }
2109
2110 /**
2111  * Translate a Bad into two.
2112  */
2113 static void lower_Bad(ir_node *node, ir_mode *mode)
2114 {
2115         ir_mode  *low_mode = env->low_unsigned;
2116         ir_graph *irg      = get_irn_irg(node);
2117         ir_node  *res_low  = new_r_Bad(irg, low_mode);
2118         ir_node  *res_high = new_r_Bad(irg, mode);
2119         ir_set_dw_lowered(node, res_low, res_high);
2120 }
2121
2122 /**
2123  * Translate a Phi.
2124  *
2125  * First step: just create two templates
2126  */
2127 static void lower_Phi(ir_node *phi)
2128 {
2129         ir_mode  *mode = get_irn_mode(phi);
2130         int       i;
2131         int       arity;
2132         ir_node **in_l;
2133         ir_node **in_h;
2134         ir_node  *unk_l;
2135         ir_node  *unk_h;
2136         ir_node  *phi_l;
2137         ir_node  *phi_h;
2138         dbg_info *dbg;
2139         ir_node  *block;
2140         ir_graph *irg;
2141         ir_mode  *mode_l;
2142         ir_mode  *mode_h;
2143
2144         /* enqueue predecessors */
2145         arity = get_Phi_n_preds(phi);
2146         for (i = 0; i < arity; ++i) {
2147                 ir_node *pred = get_Phi_pred(phi, i);
2148                 pdeq_putr(env->waitq, pred);
2149         }
2150
2151         if (mode != env->high_signed && mode != env->high_unsigned)
2152                 return;
2153
2154         /* first create a new in array */
2155         NEW_ARR_A(ir_node *, in_l, arity);
2156         NEW_ARR_A(ir_node *, in_h, arity);
2157         irg    = get_irn_irg(phi);
2158         mode_l = env->low_unsigned;
2159         mode_h = mode == env->high_signed ? env->low_signed : env->low_unsigned;
2160         unk_l  = new_r_Dummy(irg, mode_l);
2161         unk_h  = new_r_Dummy(irg, mode_h);
2162         for (i = 0; i < arity; ++i) {
2163                 in_l[i] = unk_l;
2164                 in_h[i] = unk_h;
2165         }
2166
2167         dbg   = get_irn_dbg_info(phi);
2168         block = get_nodes_block(phi);
2169         phi_l = new_rd_Phi(dbg, block, arity, in_l, mode_l);
2170         phi_h = new_rd_Phi(dbg, block, arity, in_h, mode_h);
2171
2172         ir_set_dw_lowered(phi, phi_l, phi_h);
2173
2174         /* remember that we need to fixup the predecessors later */
2175         ARR_APP1(ir_node*, env->lowered_phis, phi);
2176 }
2177
2178 static void fixup_phi(ir_node *phi)
2179 {
2180         const lower64_entry_t *entry = get_node_entry(phi);
2181         ir_node               *phi_l = entry->low_word;
2182         ir_node               *phi_h = entry->high_word;
2183         int                    arity = get_Phi_n_preds(phi);
2184         int                    i;
2185
2186         /* exchange phi predecessors which are lowered by now */
2187         for (i = 0; i < arity; ++i) {
2188                 ir_node               *pred       = get_Phi_pred(phi, i);
2189                 const lower64_entry_t *pred_entry = get_node_entry(pred);
2190
2191                 set_Phi_pred(phi_l, i, pred_entry->low_word);
2192                 set_Phi_pred(phi_h, i, pred_entry->high_word);
2193         }
2194 }
2195
2196 /**
2197  * Translate a Mux.
2198  */
2199 static void lower_Mux(ir_node *mux, ir_mode *mode)
2200 {
2201         ir_node               *truen       = get_Mux_true(mux);
2202         ir_node               *falsen      = get_Mux_false(mux);
2203         ir_node               *sel         = get_Mux_sel(mux);
2204         const lower64_entry_t *true_entry  = get_node_entry(truen);
2205         const lower64_entry_t *false_entry = get_node_entry(falsen);
2206         ir_node               *true_l      = true_entry->low_word;
2207         ir_node               *true_h      = true_entry->high_word;
2208         ir_node               *false_l     = false_entry->low_word;
2209         ir_node               *false_h     = false_entry->high_word;
2210         dbg_info              *dbgi        = get_irn_dbg_info(mux);
2211         ir_node               *block       = get_nodes_block(mux);
2212         ir_node               *res_low
2213                 = new_rd_Mux(dbgi, block, sel, false_l, true_l, env->low_unsigned);
2214         ir_node               *res_high
2215                 = new_rd_Mux(dbgi, block, sel, false_h, true_h, mode);
2216         ir_set_dw_lowered(mux, res_low, res_high);
2217 }
2218
2219 /**
2220  * Translate an ASM node.
2221  */
2222 static void lower_ASM(ir_node *asmn, ir_mode *mode)
2223 {
2224         ir_mode           *high_signed        = env->high_signed;
2225         ir_mode           *high_unsigned      = env->high_unsigned;
2226         int                n_outs             = get_ASM_n_output_constraints(asmn);
2227         ir_asm_constraint *output_constraints = get_ASM_output_constraints(asmn);
2228         ir_asm_constraint *input_constraints  = get_ASM_input_constraints(asmn);
2229         unsigned           n_64bit_outs       = 0;
2230         int      i;
2231
2232         (void)mode;
2233
2234         for (i = get_irn_arity(asmn) - 1; i >= 0; --i) {
2235                 ir_node *op      = get_irn_n(asmn, i);
2236                 ir_mode *op_mode = get_irn_mode(op);
2237                 if (op_mode == high_signed || op_mode == high_unsigned) {
2238                         panic("lowering ASM 64bit input unimplemented");
2239                 }
2240         }
2241
2242         for (i = 0; i < n_outs; ++i) {
2243                 const ir_asm_constraint *constraint = &output_constraints[i];
2244                 if (constraint->mode == high_signed || constraint->mode == high_unsigned) {
2245                         const char *constr = get_id_str(constraint->constraint);
2246                         ++n_64bit_outs;
2247                         /* TODO: How to do this architecture neutral? This is very
2248                          * i386 specific... */
2249                         if (constr[0] != '=' || constr[1] != 'A') {
2250                                 panic("lowering ASM 64bit output only supports '=A' currently");
2251                         }
2252                 }
2253         }
2254
2255         if (n_64bit_outs == 0)
2256                 return;
2257
2258         {
2259                 dbg_info          *dbgi       = get_irn_dbg_info(asmn);
2260                 ir_node           *block      = get_nodes_block(asmn);
2261                 int                arity      = get_irn_arity(asmn);
2262                 ir_node          **in         = get_irn_in(asmn) + 1;
2263                 int                new_n_outs = 0;
2264                 int                n_clobber  = get_ASM_n_clobbers(asmn);
2265                 long              *proj_map   = ALLOCAN(long, n_outs);
2266                 ident            **clobbers   = get_ASM_clobbers(asmn);
2267                 ident             *asm_text   = get_ASM_text(asmn);
2268                 ir_asm_constraint *new_outputs
2269                         = ALLOCAN(ir_asm_constraint, n_outs+n_64bit_outs);
2270                 ir_node           *new_asm;
2271                 const ir_edge_t   *edge;
2272                 const ir_edge_t   *next;
2273
2274                 for (i = 0; i < n_outs; ++i) {
2275                         const ir_asm_constraint *constraint = &output_constraints[i];
2276                         if (constraint->mode == high_signed || constraint->mode == high_unsigned) {
2277                                 new_outputs[new_n_outs].pos        = constraint->pos;
2278                                 new_outputs[new_n_outs].constraint = new_id_from_str("=a");
2279                                 new_outputs[new_n_outs].mode       = env->low_unsigned;
2280                                 proj_map[i] = new_n_outs;
2281                                 ++new_n_outs;
2282                                 new_outputs[new_n_outs].pos        = constraint->pos;
2283                                 new_outputs[new_n_outs].constraint = new_id_from_str("=d");
2284                                 if (constraint->mode == high_signed)
2285                                         new_outputs[new_n_outs].mode = env->low_signed;
2286                                 else
2287                                         new_outputs[new_n_outs].mode = env->low_unsigned;
2288                                 ++new_n_outs;
2289                         } else {
2290                                 new_outputs[new_n_outs] = *constraint;
2291                                 proj_map[i] = new_n_outs;
2292                                 ++new_n_outs;
2293                         }
2294                 }
2295                 assert(new_n_outs == n_outs+(int)n_64bit_outs);
2296
2297                 new_asm = new_rd_ASM(dbgi, block, arity, in, input_constraints,
2298                                      new_n_outs, new_outputs, n_clobber, clobbers,
2299                                      asm_text);
2300
2301                 foreach_out_edge_safe(asmn, edge, next) {
2302                         ir_node *proj      = get_edge_src_irn(edge);
2303                         ir_mode *proj_mode = get_irn_mode(proj);
2304                         long     pn;
2305
2306                         if (!is_Proj(proj))
2307                                 continue;
2308                         pn = get_Proj_proj(proj);
2309
2310                         if (pn < n_outs)
2311                                 pn = proj_map[pn];
2312                         else
2313                                 pn = new_n_outs + pn - n_outs;
2314
2315                         if (proj_mode == high_signed || proj_mode == high_unsigned) {
2316                                 ir_mode *high_mode
2317                                         = proj_mode == high_signed ? env->low_signed : env->low_unsigned;
2318                                 ir_node *np_low  = new_r_Proj(new_asm, env->low_unsigned, pn);
2319                                 ir_node *np_high = new_r_Proj(new_asm, high_mode, pn+1);
2320                                 ir_set_dw_lowered(proj, np_low, np_high);
2321                         } else {
2322                                 ir_node *np = new_r_Proj(new_asm, proj_mode, pn);
2323                                 exchange(proj, np);
2324                         }
2325                 }
2326         }
2327 }
2328
2329 /**
2330  * Lower the builtin type to its higher part.
2331  *
2332  * @param mtp  the builtin type to lower
2333  *
2334  * @return the lowered type
2335  */
2336 static ir_type *lower_Builtin_type_high(ir_type *mtp)
2337 {
2338         ir_type *res;
2339         size_t   i;
2340         size_t   n_params;
2341         size_t   n_results;
2342         bool     must_be_lowered;
2343
2344         res = (ir_type*)pmap_get(lowered_builtin_type_high, mtp);
2345         if (res != NULL)
2346                 return res;
2347
2348         n_params        = get_method_n_params(mtp);
2349         n_results       = get_method_n_ress(mtp);
2350         must_be_lowered = false;
2351
2352         /* check for double word parameter */
2353         for (i = n_params; i > 0;) {
2354                 ir_type *tp = get_method_param_type(mtp, --i);
2355
2356                 if (is_Primitive_type(tp)) {
2357                         ir_mode *mode = get_type_mode(tp);
2358
2359                         if (mode == env->high_signed || mode == env->high_unsigned) {
2360                                 must_be_lowered = true;
2361                                 break;
2362                         }
2363                 }
2364         }
2365
2366         if (!must_be_lowered) {
2367                 set_type_link(mtp, NULL);
2368                 return mtp;
2369         }
2370
2371         res = new_d_type_method(n_params, n_results, get_type_dbg_info(mtp));
2372
2373         /* set param types and result types */
2374         for (i = 0; i < n_params; ++i) {
2375                 ir_type *tp = get_method_param_type(mtp, i);
2376
2377                 if (is_Primitive_type(tp)) {
2378                         ir_mode *mode = get_type_mode(tp);
2379
2380                         if (mode == env->high_signed) {
2381                                 if (env->params->little_endian) {
2382                                         set_method_param_type(res, i, tp_u);
2383                                 } else {
2384                                         set_method_param_type(res, i, tp_s);
2385                                 }
2386                         } else if (mode == env->high_unsigned) {
2387                                 set_method_param_type(res, i, tp_u);
2388                         } else {
2389                                 set_method_param_type(res, i, tp);
2390                         }
2391                 } else {
2392                         set_method_param_type(res, i, tp);
2393                 }
2394         }
2395         for (i = n_results = 0; i < n_results; ++i) {
2396                 ir_type *tp = get_method_res_type(mtp, i);
2397
2398                 set_method_res_type(res, i, tp);
2399         }
2400
2401         set_method_variadicity(res, get_method_variadicity(mtp));
2402         set_method_calling_convention(res, get_method_calling_convention(mtp));
2403         set_method_additional_properties(res, get_method_additional_properties(mtp));
2404
2405         pmap_insert(lowered_builtin_type_high, mtp, res);
2406         return res;
2407 }
2408
2409 /**
2410  * Lower the builtin type to its lower part.
2411  *
2412  * @param mtp  the builtin type to lower
2413  *
2414  * @return the lowered type
2415  */
2416 static ir_type *lower_Builtin_type_low(ir_type *mtp)
2417 {
2418         ir_type *res;
2419         size_t   i;
2420         size_t   n_params;
2421         size_t   n_results;
2422         bool     must_be_lowered;
2423
2424         res = (ir_type*)pmap_get(lowered_builtin_type_low, mtp);
2425         if (res != NULL)
2426                 return res;
2427
2428         n_params        = get_method_n_params(mtp);
2429         n_results       = get_method_n_ress(mtp);
2430         must_be_lowered = false;
2431
2432         /* check for double word parameter */
2433         for (i = n_params; i > 0;) {
2434                 ir_type *tp = get_method_param_type(mtp, --i);
2435
2436                 if (is_Primitive_type(tp)) {
2437                         ir_mode *mode = get_type_mode(tp);
2438
2439                         if (mode == env->high_signed || mode == env->high_unsigned) {
2440                                 must_be_lowered = true;
2441                                 break;
2442                         }
2443                 }
2444         }
2445
2446         if (!must_be_lowered) {
2447                 set_type_link(mtp, NULL);
2448                 return mtp;
2449         }
2450
2451         res = new_d_type_method(n_params, n_results, get_type_dbg_info(mtp));
2452
2453         /* set param types and result types */
2454         for (i = 0; i < n_params; ++i) {
2455                 ir_type *tp = get_method_param_type(mtp, i);
2456
2457                 if (is_Primitive_type(tp)) {
2458                         ir_mode *mode = get_type_mode(tp);
2459
2460                         if (mode == env->high_signed) {
2461                                 if (env->params->little_endian) {
2462                                         set_method_param_type(res, i, tp_s);
2463                                 } else {
2464                                         set_method_param_type(res, i, tp_u);
2465                                 }
2466                         } else if (mode == env->high_unsigned) {
2467                                 set_method_param_type(res, i, tp_u);
2468                         } else {
2469                                 set_method_param_type(res, i, tp);
2470                         }
2471                 } else {
2472                         set_method_param_type(res, i, tp);
2473                 }
2474         }
2475         for (i = 0; i < n_results; ++i) {
2476                 ir_type *tp = get_method_res_type(mtp, i);
2477
2478                 set_method_res_type(res, i, tp);
2479         }
2480
2481         set_method_variadicity(res, get_method_variadicity(mtp));
2482         set_method_calling_convention(res, get_method_calling_convention(mtp));
2483         set_method_additional_properties(res, get_method_additional_properties(mtp));
2484
2485         pmap_insert(lowered_builtin_type_low, mtp, res);
2486         return res;
2487 }
2488
2489 /**
2490  * Lower double word builtins.
2491  */
2492 static void lower_Builtin(ir_node *builtin, ir_mode *mode)
2493 {
2494         ir_builtin_kind  kind         = get_Builtin_kind(builtin);
2495         ir_node         *operand;
2496         ir_mode         *operand_mode;
2497
2498         switch (kind) {
2499         case ir_bk_trap:
2500         case ir_bk_debugbreak:
2501         case ir_bk_return_address:
2502         case ir_bk_frame_address:
2503         case ir_bk_prefetch:
2504         case ir_bk_bswap:
2505         case ir_bk_inport:
2506         case ir_bk_outport:
2507         case ir_bk_inner_trampoline:
2508                 /* Nothing to do. */
2509                 return;
2510         case ir_bk_ffs:
2511         case ir_bk_clz:
2512         case ir_bk_ctz:
2513         case ir_bk_popcount:
2514         case ir_bk_parity:
2515                 break;
2516         default:
2517                 panic("unknown builtin");
2518         }
2519
2520         operand      = get_Builtin_param(builtin, 0);
2521         operand_mode = get_irn_mode(operand);
2522
2523         if (operand_mode != env->high_signed && operand_mode != env->high_unsigned)
2524                 return;
2525
2526         arch_allow_ifconv_func  allow_ifconv      = be_get_backend_param()->allow_ifconv;
2527         int                     arity             = get_irn_arity(builtin);
2528         dbg_info               *dbgi              = get_irn_dbg_info(builtin);
2529         ir_graph               *irg               = get_irn_irg(builtin);
2530         ir_type                *type              = get_Builtin_type(builtin);
2531         ir_type                *lowered_type_high = lower_Builtin_type_high(type);
2532         ir_type                *lowered_type_low  = lower_Builtin_type_low(type);
2533         ir_node                *block             = get_nodes_block(builtin);
2534         ir_node                *mem               = get_Builtin_mem(builtin);
2535         ir_node                *res;
2536
2537         assert(is_NoMem(mem));
2538         assert(arity == 2);
2539
2540         switch (kind) {
2541         case ir_bk_ffs: {
2542                 const lower64_entry_t *entry          = get_node_entry(operand);
2543                 ir_node               *in_high[1]     = {entry->high_word};
2544                 ir_node               *in_low[1]      = {entry->low_word};
2545                 ir_node               *number_of_bits = new_r_Const_long(irg, mode_Is, get_mode_size_bits(env->low_unsigned));
2546                 ir_node               *zero_signed    = new_rd_Const(dbgi, irg, get_mode_null(mode_Is));
2547                 ir_node               *zero_unsigned  = new_rd_Const(dbgi, irg, get_mode_null(mode_Iu));
2548                 ir_node               *cmp_low        = new_rd_Cmp(dbgi, block, entry->low_word, zero_unsigned, ir_relation_equal);
2549                 ir_node               *cmp_high       = new_rd_Cmp(dbgi, block, entry->high_word, zero_unsigned, ir_relation_equal);
2550                 ir_node               *ffs_high       = new_rd_Builtin(dbgi, block, mem, 1, in_high, kind, lowered_type_high);
2551                 ir_node               *high_proj      = new_r_Proj(ffs_high, mode_Is, pn_Builtin_max+1);
2552                 ir_node               *high           = new_rd_Add(dbgi, block, high_proj, number_of_bits, mode_Is);
2553                 ir_node               *ffs_low        = new_rd_Builtin(dbgi, block, mem, 1, in_low, kind, lowered_type_low);
2554                 ir_node               *low            = new_r_Proj(ffs_low, mode_Is, pn_Builtin_max+1);
2555                 ir_node               *mux_high       = new_rd_Mux(dbgi, block, cmp_high, high, zero_signed, mode_Is);
2556
2557                 if (! allow_ifconv(cmp_high, high, zero_signed))
2558                         ir_nodeset_insert(&created_mux_nodes, mux_high);
2559
2560                 res = new_rd_Mux(dbgi, block, cmp_low, low, mux_high, mode_Is);
2561
2562                 if (! allow_ifconv(cmp_low, low, mux_high))
2563                         ir_nodeset_insert(&created_mux_nodes, res);
2564                 break;
2565         }
2566         case ir_bk_clz: {
2567                 const lower64_entry_t *entry          = get_node_entry(operand);
2568                 ir_node               *in_high[1]     = {entry->high_word};
2569                 ir_node               *in_low[1]      = {entry->low_word};
2570                 ir_node               *number_of_bits = new_r_Const_long(irg, mode_Is, get_mode_size_bits(mode));
2571                 ir_node               *zero_unsigned  = new_rd_Const(dbgi, irg, get_mode_null(mode_Iu));
2572                 ir_node               *cmp_high       = new_rd_Cmp(dbgi, block, entry->high_word, zero_unsigned, ir_relation_equal);
2573                 ir_node               *clz_high       = new_rd_Builtin(dbgi, block, mem, 1, in_high, kind, lowered_type_high);
2574                 ir_node               *high           = new_r_Proj(clz_high, mode_Is, pn_Builtin_max+1);
2575                 ir_node               *clz_low        = new_rd_Builtin(dbgi, block, mem, 1, in_low, kind, lowered_type_low);
2576                 ir_node               *low_proj       = new_r_Proj(clz_low, mode_Is, pn_Builtin_max+1);
2577                 ir_node               *low            = new_rd_Add(dbgi, block, low_proj, number_of_bits, mode_Is);
2578
2579                 res = new_rd_Mux(dbgi, block, cmp_high, high, low, mode_Is);
2580
2581                 if (! allow_ifconv(cmp_high, high, low))
2582                         ir_nodeset_insert(&created_mux_nodes, res);
2583                 break;
2584         }
2585         case ir_bk_ctz: {
2586                 const lower64_entry_t *entry          = get_node_entry(operand);
2587                 ir_node               *in_high[1]     = {entry->high_word};
2588                 ir_node               *in_low[1]      = {entry->low_word};
2589                 ir_node               *number_of_bits = new_r_Const_long(irg, mode_Is, get_mode_size_bits(env->low_unsigned));
2590                 ir_node               *zero_unsigned  = new_rd_Const(dbgi, irg, get_mode_null(mode_Iu));
2591                 ir_node               *cmp_low        = new_rd_Cmp(dbgi, block, entry->low_word, zero_unsigned, ir_relation_equal);
2592                 ir_node               *ffs_high       = new_rd_Builtin(dbgi, block, mem, 1, in_high, kind, lowered_type_high);
2593                 ir_node               *high_proj      = new_r_Proj(ffs_high, mode_Is, pn_Builtin_max+1);
2594                 ir_node               *high           = new_rd_Add(dbgi, block, high_proj, number_of_bits, mode_Is);
2595                 ir_node               *ffs_low        = new_rd_Builtin(dbgi, block, mem, 1, in_low, kind, lowered_type_low);
2596                 ir_node               *low            = new_r_Proj(ffs_low, mode_Is, pn_Builtin_max+1);
2597
2598                 res = new_rd_Mux(dbgi, block, cmp_low, low, high, mode_Is);
2599
2600                 if (! allow_ifconv(cmp_low, low, high))
2601                         ir_nodeset_insert(&created_mux_nodes, res);
2602                 break;
2603         }
2604         case ir_bk_popcount: {
2605                 const lower64_entry_t *entry         = get_node_entry(operand);
2606                 ir_node               *in_high[1]    = {entry->high_word};
2607                 ir_node               *in_low[1]     = {entry->low_word};
2608                 ir_node               *popcount_high = new_rd_Builtin(dbgi, block, mem, 1, in_high, kind, lowered_type_high);
2609                 ir_node               *popcount_low  = new_rd_Builtin(dbgi, block, mem, 1, in_low, kind, lowered_type_low);
2610                 ir_node               *high          = new_r_Proj(popcount_high, mode_Is, pn_Builtin_max+1);
2611                 ir_node               *low           = new_r_Proj(popcount_low, mode_Is, pn_Builtin_max+1);
2612
2613                 res = new_rd_Add(dbgi, block, high, low, mode_Is);
2614                 break;
2615         }
2616         case ir_bk_parity: {
2617                 const lower64_entry_t *entry = get_node_entry(operand);
2618                 ir_node *in_high[1] = {entry->high_word};
2619                 ir_node *in_low[1] = {entry->low_word};
2620                 ir_node  *parity_high;
2621                 ir_node  *parity_low;
2622                 ir_node  *high;
2623                 ir_node  *low;
2624
2625                 assert(arity == 2);
2626
2627                 parity_high = new_rd_Builtin(dbgi, block, mem, 1, in_high, kind, lowered_type_high);
2628                 high        = new_r_Proj(parity_high, mode_Is, pn_Builtin_max+1);
2629                 parity_low  = new_rd_Builtin(dbgi, block, mem, 1, in_low, kind, lowered_type_low);
2630                 low         = new_r_Proj(parity_low, mode_Is, pn_Builtin_max+1);
2631                 res         = new_rd_Eor(dbgi, block, high, low, mode_Is);
2632                 break;
2633         }
2634         default:
2635                 panic("unexpected builtin");
2636         }
2637
2638         turn_into_tuple(builtin, 2);
2639         set_irn_n(builtin, pn_Builtin_M, mem);
2640         set_irn_n(builtin, pn_Builtin_max+1, res);
2641 }
2642
2643 /**
2644  * check for opcodes that must always be lowered.
2645  */
2646 static bool always_lower(unsigned code)
2647 {
2648         switch (code) {
2649         case iro_ASM:
2650         case iro_Builtin:
2651         case iro_Proj:
2652         case iro_Start:
2653         case iro_Call:
2654         case iro_Return:
2655         case iro_Cond:
2656         case iro_Conv:
2657         case iro_Sel:
2658                 return true;
2659         default:
2660                 return false;
2661         }
2662 }
2663
2664 /**
2665  * Compare two op_mode_entry_t's.
2666  */
2667 static int cmp_op_mode(const void *elt, const void *key, size_t size)
2668 {
2669         const op_mode_entry_t *e1 = (const op_mode_entry_t*)elt;
2670         const op_mode_entry_t *e2 = (const op_mode_entry_t*)key;
2671         (void) size;
2672
2673         return (e1->op != e2->op) | (e1->imode != e2->imode) | (e1->omode != e2->omode);
2674 }
2675
2676 /**
2677  * Compare two conv_tp_entry_t's.
2678  */
2679 static int cmp_conv_tp(const void *elt, const void *key, size_t size)
2680 {
2681         const conv_tp_entry_t *e1 = (const conv_tp_entry_t*)elt;
2682         const conv_tp_entry_t *e2 = (const conv_tp_entry_t*)key;
2683         (void) size;
2684
2685         return (e1->imode != e2->imode) | (e1->omode != e2->omode);
2686 }
2687
2688 /**
2689  * Enter a lowering function into an ir_op.
2690  */
2691 void ir_register_dw_lower_function(ir_op *op, lower_dw_func func)
2692 {
2693         op->ops.generic = (op_func)func;
2694 }
2695
2696 /* Determine which modes need to be lowered */
2697 static void setup_modes(void)
2698 {
2699         unsigned           size_bits           = env->params->doubleword_size;
2700         ir_mode           *doubleword_signed   = NULL;
2701         ir_mode           *doubleword_unsigned = NULL;
2702         size_t             n_modes             = get_irp_n_modes();
2703         ir_mode_arithmetic arithmetic;
2704         unsigned           modulo_shift;
2705         size_t             i;
2706
2707         /* search for doubleword modes... */
2708         for (i = 0; i < n_modes; ++i) {
2709                 ir_mode *mode = get_irp_mode(i);
2710                 if (!mode_is_int(mode))
2711                         continue;
2712                 if (get_mode_size_bits(mode) != size_bits)
2713                         continue;
2714                 if (mode_is_signed(mode)) {
2715                         if (doubleword_signed != NULL) {
2716                                 /* sigh - the lowerer should really just lower all mode with
2717                                  * size_bits it finds. Unfortunately this required a bigger
2718                                  * rewrite. */
2719                                 panic("multiple double word signed modes found");
2720                         }
2721                         doubleword_signed = mode;
2722                 } else {
2723                         if (doubleword_unsigned != NULL) {
2724                                 /* sigh - the lowerer should really just lower all mode with
2725                                  * size_bits it finds. Unfortunately this required a bigger
2726                                  * rewrite. */
2727                                 panic("multiple double word unsigned modes found");
2728                         }
2729                         doubleword_unsigned = mode;
2730                 }
2731         }
2732         if (doubleword_signed == NULL || doubleword_unsigned == NULL) {
2733                 panic("Couldn't find doubleword modes");
2734         }
2735
2736         arithmetic   = get_mode_arithmetic(doubleword_signed);
2737         modulo_shift = get_mode_modulo_shift(doubleword_signed);
2738
2739         assert(get_mode_size_bits(doubleword_unsigned) == size_bits);
2740         assert(size_bits % 2 == 0);
2741         assert(get_mode_sign(doubleword_signed) == 1);
2742         assert(get_mode_sign(doubleword_unsigned) == 0);
2743         assert(get_mode_sort(doubleword_signed) == irms_int_number);
2744         assert(get_mode_sort(doubleword_unsigned) == irms_int_number);
2745         assert(get_mode_arithmetic(doubleword_unsigned) == arithmetic);
2746         assert(get_mode_modulo_shift(doubleword_unsigned) == modulo_shift);
2747
2748         /* try to guess a sensible modulo shift for the new mode.
2749          * (This is IMO another indication that this should really be a node
2750          *  attribute instead of a mode thing) */
2751         if (modulo_shift == size_bits) {
2752                 modulo_shift = modulo_shift / 2;
2753         } else if (modulo_shift == 0) {
2754                 /* fine */
2755         } else {
2756                 panic("Don't know what new modulo shift to use for lowered doubleword mode");
2757         }
2758         size_bits /= 2;
2759
2760         /* produce lowered modes */
2761         env->high_signed   = doubleword_signed;
2762         env->high_unsigned = doubleword_unsigned;
2763         env->low_signed    = new_int_mode("WS", arithmetic, size_bits, 1,
2764                                           modulo_shift);
2765         env->low_unsigned  = new_int_mode("WU", arithmetic, size_bits, 0,
2766                                           modulo_shift);
2767 }
2768
2769 static void enqueue_preds(ir_node *node)
2770 {
2771         int arity = get_irn_arity(node);
2772         int i;
2773
2774         for (i = 0; i < arity; ++i) {
2775                 ir_node *pred = get_irn_n(node, i);
2776                 pdeq_putr(env->waitq, pred);
2777         }
2778 }
2779
2780 static void lower_node(ir_node *node)
2781 {
2782         int              arity;
2783         int              i;
2784         lower_dw_func    func;
2785         ir_op           *op;
2786         ir_mode         *mode;
2787         unsigned         idx;
2788         lower64_entry_t *entry;
2789
2790         if (irn_visited_else_mark(node))
2791                 return;
2792
2793         /* cycles are always broken at Phi and Block nodes. So we don't need special
2794          * magic in all the other lower functions */
2795         if (is_Block(node)) {
2796                 enqueue_preds(node);
2797                 return;
2798         } else if (is_Phi(node)) {
2799                 lower_Phi(node);
2800                 return;
2801         }
2802
2803         /* depth-first: descend into operands */
2804         if (!is_Block(node)) {
2805                 ir_node *block = get_nodes_block(node);
2806                 lower_node(block);
2807         }
2808
2809         if (!is_Cond(node)) {
2810                 arity = get_irn_arity(node);
2811                 for (i = 0; i < arity; ++i) {
2812                         ir_node *pred = get_irn_n(node, i);
2813                         lower_node(pred);
2814                 }
2815         }
2816
2817         op   = get_irn_op(node);
2818         func = (lower_dw_func) op->ops.generic;
2819         if (func == NULL)
2820                 return;
2821
2822         idx   = get_irn_idx(node);
2823         entry = idx < env->n_entries ? env->entries[idx] : NULL;
2824         if (entry != NULL || always_lower(get_irn_opcode(node))) {
2825                 mode = get_irn_op_mode(node);
2826                 if (mode == env->high_signed) {
2827                         mode = env->low_signed;
2828                 } else {
2829                         mode = env->low_unsigned;
2830                 }
2831                 DB((dbg, LEVEL_1, "  %+F\n", node));
2832                 func(node, mode);
2833         }
2834 }
2835
2836 static void clear_node_and_phi_links(ir_node *node, void *data)
2837 {
2838         (void) data;
2839         if (get_irn_mode(node) == mode_T) {
2840                 set_irn_link(node, node);
2841         } else {
2842                 set_irn_link(node, NULL);
2843         }
2844         if (is_Block(node))
2845                 set_Block_phis(node, NULL);
2846         else if (is_Phi(node))
2847                 set_Phi_next(node, NULL);
2848 }
2849
2850 static void lower_irg(ir_graph *irg)
2851 {
2852         ir_entity *ent;
2853         ir_type   *mtp;
2854         ir_type   *lowered_mtp;
2855         unsigned   n_idx;
2856
2857         obstack_init(&env->obst);
2858
2859         /* just here for debugging */
2860         current_ir_graph = irg;
2861         edges_assure(irg);
2862
2863         n_idx = get_irg_last_idx(irg);
2864         n_idx = n_idx + (n_idx >> 2);  /* add 25% */
2865         env->n_entries = n_idx;
2866         env->entries   = NEW_ARR_F(lower64_entry_t*, n_idx);
2867         memset(env->entries, 0, sizeof(env->entries[0]) * n_idx);
2868
2869         env->irg            = irg;
2870         env->flags          = 0;
2871
2872         ent = get_irg_entity(irg);
2873         mtp = get_entity_type(ent);
2874         lowered_mtp = lower_mtp(mtp);
2875
2876         if (lowered_mtp != mtp) {
2877                 set_entity_type(ent, lowered_mtp);
2878                 env->flags |= MUST_BE_LOWERED;
2879
2880                 fix_parameter_entities(irg);
2881         }
2882
2883         /* first step: link all nodes and allocate data */
2884         ir_reserve_resources(irg, IR_RESOURCE_PHI_LIST | IR_RESOURCE_IRN_LINK);
2885         visit_all_identities(irg, clear_node_and_phi_links, NULL);
2886         irg_walk_graph(irg, NULL, prepare_links_and_handle_rotl, env);
2887
2888         if (env->flags & MUST_BE_LOWERED) {
2889                 size_t i;
2890                 ir_reserve_resources(irg, IR_RESOURCE_IRN_VISITED);
2891                 inc_irg_visited(irg);
2892
2893                 assert(pdeq_empty(env->waitq));
2894                 pdeq_putr(env->waitq, get_irg_end(irg));
2895
2896                 env->lowered_phis = NEW_ARR_F(ir_node*, 0);
2897                 while (!pdeq_empty(env->waitq)) {
2898                         ir_node *node = (ir_node*)pdeq_getl(env->waitq);
2899                         lower_node(node);
2900                 }
2901
2902                 /* we need to fixup phis */
2903                 for (i = 0; i < ARR_LEN(env->lowered_phis); ++i) {
2904                         ir_node *phi = env->lowered_phis[i];
2905                         fixup_phi(phi);
2906                 }
2907                 DEL_ARR_F(env->lowered_phis);
2908
2909
2910                 ir_free_resources(irg, IR_RESOURCE_IRN_VISITED);
2911
2912                 if (env->flags & CF_CHANGED) {
2913                         /* control flow changed, dominance info is invalid */
2914                         clear_irg_state(irg, IR_GRAPH_STATE_CONSISTENT_DOMINANCE
2915                                            | IR_GRAPH_STATE_VALID_EXTENDED_BLOCKS);
2916                 }
2917                 edges_deactivate(irg);
2918         }
2919
2920         ir_free_resources(irg, IR_RESOURCE_PHI_LIST | IR_RESOURCE_IRN_LINK);
2921
2922         DEL_ARR_F(env->entries);
2923         obstack_free(&env->obst, NULL);
2924 }
2925
2926 static const lwrdw_param_t *param;
2927
2928 void ir_prepare_dw_lowering(const lwrdw_param_t *new_param)
2929 {
2930         assert(new_param != NULL);
2931         FIRM_DBG_REGISTER(dbg, "firm.lower.dw");
2932
2933         param = new_param;
2934
2935         clear_irp_opcodes_generic_func();
2936         ir_register_dw_lower_function(op_ASM,     lower_ASM);
2937         ir_register_dw_lower_function(op_Add,     lower_binop);
2938         ir_register_dw_lower_function(op_And,     lower_And);
2939         ir_register_dw_lower_function(op_Bad,     lower_Bad);
2940         ir_register_dw_lower_function(op_Builtin, lower_Builtin);
2941         ir_register_dw_lower_function(op_Call,    lower_Call);
2942         ir_register_dw_lower_function(op_Cmp,     lower_Cmp);
2943         ir_register_dw_lower_function(op_Cond,    lower_Cond);
2944         ir_register_dw_lower_function(op_Const,   lower_Const);
2945         ir_register_dw_lower_function(op_Conv,    lower_Conv);
2946         ir_register_dw_lower_function(op_Div,     lower_Div);
2947         ir_register_dw_lower_function(op_Eor,     lower_Eor);
2948         ir_register_dw_lower_function(op_Load,    lower_Load);
2949         ir_register_dw_lower_function(op_Minus,   lower_unop);
2950         ir_register_dw_lower_function(op_Mod,     lower_Mod);
2951         ir_register_dw_lower_function(op_Mul,     lower_binop);
2952         ir_register_dw_lower_function(op_Mux,     lower_Mux);
2953         ir_register_dw_lower_function(op_Not,     lower_Not);
2954         ir_register_dw_lower_function(op_Or,      lower_Or);
2955         ir_register_dw_lower_function(op_Return,  lower_Return);
2956         ir_register_dw_lower_function(op_Shl,     lower_Shl);
2957         ir_register_dw_lower_function(op_Shr,     lower_Shr);
2958         ir_register_dw_lower_function(op_Shrs,    lower_Shrs);
2959         ir_register_dw_lower_function(op_Start,   lower_Start);
2960         ir_register_dw_lower_function(op_Store,   lower_Store);
2961         ir_register_dw_lower_function(op_Sub,     lower_binop);
2962         ir_register_dw_lower_function(op_Switch,  lower_Switch);
2963         ir_register_dw_lower_function(op_Unknown, lower_Unknown);
2964 }
2965
2966 /**
2967  * Callback to lower only the Mux nodes we created.
2968  */
2969 static int lower_mux_cb(ir_node *mux)
2970 {
2971         return ir_nodeset_contains(&created_mux_nodes, mux);
2972 }
2973
2974 /*
2975  * Do the lowering.
2976  */
2977 void ir_lower_dw_ops(void)
2978 {
2979         lower_dw_env_t lenv;
2980         size_t      i, n;
2981
2982         memset(&lenv, 0, sizeof(lenv));
2983         lenv.params = param;
2984         env = &lenv;
2985
2986         setup_modes();
2987
2988         /* create the necessary maps */
2989         if (! intrinsic_fkt)
2990                 intrinsic_fkt = new_set(cmp_op_mode, iro_Last + 1);
2991         if (! conv_types)
2992                 conv_types = new_set(cmp_conv_tp, 16);
2993         if (! lowered_type)
2994                 lowered_type = pmap_create();
2995         if (! lowered_builtin_type_low)
2996                 lowered_builtin_type_low = pmap_create();
2997         if (! lowered_builtin_type_high)
2998                 lowered_builtin_type_high = pmap_create();
2999
3000         /* create a primitive unsigned and signed type */
3001         if (! tp_u)
3002                 tp_u = get_type_for_mode(lenv.low_unsigned);
3003         if (! tp_s)
3004                 tp_s = get_type_for_mode(lenv.low_signed);
3005
3006         /* create method types for the created binop calls */
3007         if (! binop_tp_u) {
3008                 binop_tp_u = new_type_method(4, 2);
3009                 set_method_param_type(binop_tp_u, 0, tp_u);
3010                 set_method_param_type(binop_tp_u, 1, tp_u);
3011                 set_method_param_type(binop_tp_u, 2, tp_u);
3012                 set_method_param_type(binop_tp_u, 3, tp_u);
3013                 set_method_res_type(binop_tp_u, 0, tp_u);
3014                 set_method_res_type(binop_tp_u, 1, tp_u);
3015         }
3016         if (! binop_tp_s) {
3017                 binop_tp_s = new_type_method(4, 2);
3018                 if (env->params->little_endian) {
3019                         set_method_param_type(binop_tp_s, 0, tp_u);
3020                         set_method_param_type(binop_tp_s, 1, tp_s);
3021                         set_method_param_type(binop_tp_s, 2, tp_u);
3022                         set_method_param_type(binop_tp_s, 3, tp_s);
3023                         set_method_res_type(binop_tp_s, 0, tp_u);
3024                         set_method_res_type(binop_tp_s, 1, tp_s);
3025                 } else {
3026                         set_method_param_type(binop_tp_s, 0, tp_s);
3027                         set_method_param_type(binop_tp_s, 1, tp_u);
3028                         set_method_param_type(binop_tp_s, 2, tp_s);
3029                         set_method_param_type(binop_tp_s, 3, tp_u);
3030                         set_method_res_type(binop_tp_s, 0, tp_s);
3031                         set_method_res_type(binop_tp_s, 1, tp_u);
3032                 }
3033         }
3034         if (! unop_tp_u) {
3035                 unop_tp_u = new_type_method(2, 2);
3036                 set_method_param_type(unop_tp_u, 0, tp_u);
3037                 set_method_param_type(unop_tp_u, 1, tp_u);
3038                 set_method_res_type(unop_tp_u, 0, tp_u);
3039                 set_method_res_type(unop_tp_u, 1, tp_u);
3040         }
3041         if (! unop_tp_s) {
3042                 unop_tp_s = new_type_method(2, 2);
3043                 if (env->params->little_endian) {
3044                         set_method_param_type(unop_tp_s, 0, tp_u);
3045                         set_method_param_type(unop_tp_s, 1, tp_s);
3046                         set_method_res_type(unop_tp_s, 0, tp_u);
3047                         set_method_res_type(unop_tp_s, 1, tp_s);
3048                 } else {
3049                         set_method_param_type(unop_tp_s, 0, tp_s);
3050                         set_method_param_type(unop_tp_s, 1, tp_u);
3051                         set_method_res_type(unop_tp_s, 0, tp_s);
3052                         set_method_res_type(unop_tp_s, 1, tp_u);
3053                 }
3054         }
3055
3056         lenv.tv_mode_bytes = new_tarval_from_long(param->doubleword_size/(2*8), lenv.low_unsigned);
3057         lenv.tv_mode_bits  = new_tarval_from_long(param->doubleword_size/2, lenv.low_unsigned);
3058         lenv.waitq         = new_pdeq();
3059         lenv.first_id      = new_id_from_chars(param->little_endian ? ".l" : ".h", 2);
3060         lenv.next_id       = new_id_from_chars(param->little_endian ? ".h" : ".l", 2);
3061
3062         irp_reserve_resources(irp, IRP_RESOURCE_TYPE_LINK);
3063         /* transform all graphs */
3064         for (i = 0, n = get_irp_n_irgs(); i < n; ++i) {
3065                 ir_graph *irg = get_irp_irg(i);
3066
3067                 ir_nodeset_init(&created_mux_nodes);
3068
3069                 lower_irg(irg);
3070
3071                 if (ir_nodeset_size(&created_mux_nodes) > 0)
3072                         lower_mux(irg, lower_mux_cb);
3073
3074                 ir_nodeset_destroy(&created_mux_nodes);
3075         }
3076         irp_free_resources(irp, IRP_RESOURCE_TYPE_LINK);
3077         del_pdeq(lenv.waitq);
3078
3079         env = NULL;
3080 }
3081
3082 /* Default implementation. */
3083 ir_entity *def_create_intrinsic_fkt(ir_type *method, const ir_op *op,
3084                                     const ir_mode *imode, const ir_mode *omode,
3085                                     void *context)
3086 {
3087         char buf[64];
3088         ident *id;
3089         ir_entity *ent;
3090         (void) context;
3091
3092         if (imode == omode) {
3093                 snprintf(buf, sizeof(buf), "__l%s%s", get_op_name(op), get_mode_name(imode));
3094         } else {
3095                 snprintf(buf, sizeof(buf), "__l%s%s%s", get_op_name(op),
3096                         get_mode_name(imode), get_mode_name(omode));
3097         }
3098         id = new_id_from_str(buf);
3099
3100         ent = new_entity(get_glob_type(), id, method);
3101         set_entity_ld_ident(ent, get_entity_ident(ent));
3102         set_entity_visibility(ent, ir_visibility_external);
3103         return ent;
3104 }